The LS-series engine swaps in Fieros are becoming fairly common.... yet so little talk about the new LS7. Its basicly the same externally as all the other LS engines
...anyone contemplating an LS7 in a Fiero
edit....to add a picture...
[This message has been edited by Joe Carburetor (edited 11-12-2006).]
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08:53 PM
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madcurl Member
Posts: 21401 From: In a Van down by the Kern River Registered: Jul 2003
The LS-series engine swaps in Fieros are becoming fairly common.... yet so little talk about the new LS7. Its basicly the same externally as all the other LS engines
...anyone contemplating an LS7 in a Fiero
Yep. But it isn't me.
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09:02 PM
typhoon Member
Posts: 1006 From: The Peoples Republic of Wisconsin Registered: Sep 2005
the price of the motor is stoping me to. and than you still need to buy the kit, dry sump set up, and all the other little stuff. when done i think a install like this would cost 25,000 or more to complete. great motor though.
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09:34 PM
Formula88 Member
Posts: 53788 From: Raleigh NC Registered: Jan 2001
The regular LS1 kit may not work due to changes for the dry sump, etc. But other than that, I'd say it's the price that's keeping most people from doing it. For my money, I'd probably be just as happy with an LS6 6-speed.
It will have a turbo or super charger set up, still doing the research.
i think the 11:1 compression of the LS7 is a bit much for boost. Reason why they havent done it from the factory yet for the Corvette SS. Although if you wanted to spray it....
------------------ Fiero- mild 2.9 160hp Caprice- wild 383 500hp --Adam-- ASE Certified Technician IM AOL: FieroGT5speed
Yep, my wallet through a rod just reading the engine cost. I don't think we take the cliche "it's in my blood" as serious as what it implies. There truly is never enough horsepower. I'm currently at about 250 hp with my turbo 3100, and my car is fast yet I'm struggling with whether I should tackle the 3900 upgrade at 240/240 over my initially planned and purchased 3500 at 200/220 stock before cam upgrade and turbocharging. Either way I'll be looking at no less than an additional 100 hp and lb/ft which will be a significant gain over the current engine yet I'm still struggling with basically .4 more litres and less than a 40 hp and 20 lb/ft gain due to the cam change in my 3.5 at a cost of ~$850 to move up to the 3.9.
Horsepower and torque is like money, you can never have too much or enough.
[This message has been edited by Joseph Upson (edited 11-13-2006).]
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03:08 AM
R Runner Member
Posts: 3700 From: Scottsville, KY Registered: Feb 2003
i think the 11:1 compression of the LS7 is a bit much for boost. Reason why they havent done it from the factory yet for the Corvette SS. Although if you wanted to spray it....
But they will.
It's coming.........
------------------ Paul Pontiac prestiege.... Pontiac performance...... Pontiac POWER! For a full history of the Fiero SS: http://www.cardomain.com/ride/789315
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07:49 AM
Formula88 Member
Posts: 53788 From: Raleigh NC Registered: Jan 2001
Sure seems like you could get an ecotec up to 500+ hp with that money easy, I paid 300 for the motor/trans. 16k to build it up seems pretty easy....
Just my .02 Let the flames blaze
No flame... but it's a pretty proven fact that "building up" a motor like that to 500+ hp will not be even remotely as reliable over the long term as an engine built for 500 hp from the get-go without any mods (factory warranty).
No flame... but it's a pretty proven fact that "building up" a motor like that to 500+ hp will not be even remotely as reliable over the long term as an engine built for 500 hp from the get-go without any mods (factory warranty).
Who said anything about reliablity? , i cant think of anyone running 500+ but some r running 400+ without problems so far, then again the engine is an infant and only time will tell what it can handle without problems
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12:06 PM
m0sh_man Member
Posts: 8460 From: south charleston WV 25309 Registered: Feb 2002
The LS7 is a sweet engine but there is no way it's cost effective. You can get an LS1, LS2 or LS6 and get 505HP for far less than $13k. If the car comes with an LS7, great, but a swap? I'd pick something else.
No flame... but it's a pretty proven fact that "building up" a motor like that to 500+ hp will not be even remotely as reliable over the long term as an engine built for 500 hp from the get-go without any mods (factory warranty).
Sorry, but GM will not waranty the engine if it is installed in a vehicle that did not originally come with that engine. Gotta read the fine print.
-Chuck '87 FIero GT Have you seen my car?
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07:53 PM
ryan.hess Member
Posts: 20784 From: Orlando, FL Registered: Dec 2002
for my money id rather have a 4.4L motor from a cadillac XLR-V 443HP and 413ft/lbs its a very clean looking motor too, 32 valve v8
definatly the motor id want in my fiero.
matthew
...it would cost about the same too..... Although if you get lucky you might find one from a rollover for $6k.... add the $3k ECM and you're all set....
Last I checked, crate motors from GMPP don't come in vehicles, and they get at least some warranty. World has a pretty good reputation too.
-- Rodney
quote
Originally posted by S8N: Sorry, but GM will not waranty the engine if it is installed in a vehicle that did not originally come with that engine. Gotta read the fine print.
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10:47 PM
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02SOMFormula Member
Posts: 120 From: Carmichael, CA USA Registered: Apr 2006
i think the 11:1 compression of the LS7 is a bit much for boost. Reason why they havent done it from the factory yet for the Corvette SS. Although if you wanted to spray it....
So far, the new "blue devil" will have a 6.2L motor built for this car! So not an 11:1 comp LS7. There dubbing it something else!
Also, IMO, knowing what an LS1 can handle, and knowing what the LS7 is built for and seeing what it can handle, I think that a built LS1 would be a better "bang for the buck" then the LS7! But the reaction that you would get from an LS7 in a Fiero would be priceless! There is someone at the local track I go to (Sacramento Raceway) that has an RX-7 with an LS7, and that thing is pretty baddass! He also has a 250hp N20 setup on it, with a mild custom cam in it! 510rwhp on motor only! He mainly auto-x's it, but at the track, he was getting traction limited low 11's all night! He was on Nitto 555rII's, and the suspension was set up for auto-x! So ummm yeah! That LS7 is pretty baddass! Titanium rods, CNC machined cyl. heads with 11deg valve angles......ummmm yeah! LS7 FTW! I say if you can do it, go for it!
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11:07 PM
Nov 14th, 2006
m0sh_man Member
Posts: 8460 From: south charleston WV 25309 Registered: Feb 2002
...it would cost about the same too..... Although if you get lucky you might find one from a rollover for $6k.... add the $3k ECM and you're all set....
other than the supercharger, what else is different from your typical northstar install? isnt it just a destroked northstar with supercharger and different cams?
matthew
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09:20 AM
ryan.hess Member
Posts: 20784 From: Orlando, FL Registered: Dec 2002
good luck finding a tranny to handle that too! 505 so they say *cough cough* under rated! you do know the new Z06 runs 10.95? @ 129 with just a set of different tires.
------------------ 3800 SC/IC Formula people tell me the car whines more then I do....
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10:19 AM
m0sh_man Member
Posts: 8460 From: south charleston WV 25309 Registered: Feb 2002
when I heard about this engine and the stats for it. I was very intrested... When I saw the Price I realised I coupld get a 900hp ls2 for that cost. granted, I think that is too much power for a fiero (though would love to see it done) It is just something to think about. The one thing that in my mind helps to make the engine worth the cost is the fact that it has made the corvette not only the fastest production corvette in its history, but also the most fuel efficient. 37mpg and speeds up to 200mph why not?
Last I checked, crate motors from GMPP don't come in vehicles, and they get at least some warranty. World has a pretty good reputation too.
-- Rodney
Last time I checked crate motors came in 100s of GM vehicles. SBC anyone? If it didn't come with a SBC, a crate engine SBC doesn't get a warranty. Go to the dealership and read the fine print.
-Chuck '87 GT
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08:26 PM
GTFiero1 Member
Posts: 6508 From: Camden County NJ Registered: Sep 2001
Last time I checked crate motors came in 100s of GM vehicles. SBC anyone? If it didn't come with a SBC, a crate engine SBC doesn't get a warranty. Go to the dealership and read the fine print.
-Chuck '87 GT
SBC 350 GM motors? 3 years or 50,000 miles in any GM car or half-ton pickup truck from 1970 to 1985 originally equipped with a 350 - ALL OTHER APPLICATIONS RECEIVE A LIMITED WARRANTY FOR 12 MONTHS OR 12,000 MILES.
guess you gotta read the fine print
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10:36 PM
Nov 15th, 2006
88GT5.0KILLER Member
Posts: 590 From: Watching a once great nation become a 3rd world slum. The power of stockpiles of ammo. Registered: Jul 2002
the price of the motor is stoping me to. and than you still need to buy the kit, dry sump set up, and all the other little stuff. when done i think a install like this would cost 25,000 or more to complete. great motor though.
a kit? Wouldnt the standard V8 kit work as well? 25K? I think youve missed the mark a little.
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12:06 PM
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88GT5.0KILLER Member
Posts: 590 From: Watching a once great nation become a 3rd world slum. The power of stockpiles of ammo. Registered: Jul 2002
Originally posted by m0sh_man: other than the supercharger, what else is different from your typical northstar install? isnt it just a destroked northstar with supercharger and different cams?
matthew
The Front Wheel Drive North Star engines are not exactly the same as the Rear Wheel Drive engines. The RWD N* engines have HUGE intake and exhaust ports. The FWD N* engines have microscopic exhaust ports to keep exhaust gas speed very high for smog reasons. The RWD N*s have the cats very close to the exhaust ports so the exhaust does not cool down to much before entering the cat. Power potential is greater in the RWD N*. But the FWD N* is a more compact package for the Fiero engine bay because of the accessory drive system.
SBC 350 GM motors? 3 years or 50,000 miles in any GM car or half-ton pickup truck from 1970 to 1985 originally equipped with a 350 - ALL OTHER APPLICATIONS RECEIVE A LIMITED WARRANTY FOR 12 MONTHS OR 12,000 MILES.
guess you gotta read the fine print
Sorry, I was reading from the actual GM warranty book. He's a page I found online though: http://www.who-sells-it.com/ctp/245/322/full/ I was using th e SBC as an example since Rodney doesn't think GMPP sells engines that go into real GM vehicles. The warranty you state will be honored if you stick the 350 into a Camaro that originally came with the straight six (this is another example). Read the fine print a little further.
I wouldn't use anything less than a 4T80e auto, or a G6 manual with this engine.
A stock LS7 passes 2007 federal emission standards....why modify this engine at all??? ( ....like 505 horsepower isn't enough!!!)....anything more would be useless in a Fiero.
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12:37 AM
5.0Vert Member
Posts: 287 From: Hurst, Tx, USA Registered: Mar 2005
I wouldn't use anything less than a 4T80e auto, or a G6 manual with this engine.
A stock LS7 passes 2007 federal emission standards....why modify this engine at all??? ( ....like 505 horsepower isn't enough!!!)....anything more would be useless in a Fiero.
You may think its useless, but someone somewhere out there will be willing to use it. I have a couple friends with over 600rwhp and they abuse their cars all the time. They even do 'highway racing in Mexico' at least once a week. I'm only in the 400's but I don't doubt that I would tap the full potential of a stokc LS7, and it'd probably get a bottle as well.
Sorry, I was reading from the actual GM warranty book. He's a page I found online though: http://www.who-sells-it.com/ctp/245/322/full/ I was using th e SBC as an example since Rodney doesn't think GMPP sells engines that go into real GM vehicles. The warranty you state will be honored if you stick the 350 into a Camaro that originally came with the straight six (this is another example). Read the fine print a little further.
LOL - I think you may have totally missed the point of my initial post anyway. A 500+ hp EcoTec is not going to be as reliable of a powerplant... whereas any crate motor designed to put out 500hp will be more reliable. Which is why GM normally offers a warranty on something like that!
My apologies for not spelling that out more-clearly, as I just assumed people would see the reliability side of the statement... not just read the word "warranty"
[This message has been edited by MinnGreenGT (edited 11-16-2006).]
I wouldn't use anything less than a 4T80e auto, or a G6 manual with this engine.
A stock LS7 passes 2007 federal emission standards....why modify this engine at all??? ( ....like 505 horsepower isn't enough!!!)....anything more would be useless in a Fiero.
The G6 manual 6 speed is only rated for about 290 ftlbs or torque... I think an LS7 would be a bit more than that
, i cant think of anyone running 500+ but some r running 400+ without problems so far, then again the engine is an infant and only time will tell what it can handle without problems
