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| Sorry but i gotta ask, whats the story with Archie and Cletus? (Page 9/20) |
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Pyrthian
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JAN 09, 12:41 PM
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| quote | Originally posted by Fiero5:
I get the feeling that some members seem to think that some actually do have dyno slips but now don't seem to want to admit it and show them for whatever reasons.
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as they should (or shouldn't) - you wanna give it a go, come get some. I dont have to give anyone squat. anything I say can and will be used against me on the track. your insecurities are NOT my problem.
not directed specificly at you - directed at the same people you referance in your post.
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Fino
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JAN 09, 12:50 PM
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Numbers Numbers.
Isn’t the most important thing at the end of an engine swap “the size of the smile on the owners face” no mater what engine he has in his car?
Ed------------------
Fino
www.feroce.net
Member National Kit Car Club
Lifetime Member CFOGi
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Oreif
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JAN 09, 01:32 PM
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| quote | Originally posted by Pyrthian:
but - anyways - what this says is: if they dont have a dyno slip - they are not done yet. or - its just a crate swap, and their power is anywhere between the rated power to 30% below that. or even lower - if they cannot manage to provide decent intake & exhaust systems to the crate motor - which is implied for MOST Fiero V8 setups.
has anyone managed to put a reasonable exhaust system on a SBC Fiero? most crate motors rated power has an assumption of decent exhaust manifolds.
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That is incorrect. I have a crate engine rated at 355hp and it puts down 309 rwhp. That is only a 12-13% loss which is easily attributed to typical driveline loss of a transaxle.
The thing is that some don't take into account is when things get modified power changes. If you take a crate engine designed to have a specific set-up and you change the set-up, Then you have no clue what the power is and depending on the mod, you could lose power. You really do not need a dyno run to tune the car for typical street driving with a standard crate engine. I doubt any crate engine that is set-up as recommended would have a 30% loss in power. Most crate engines should be +/- 5% of their rated power. If not then something else like a poor mod or a bad equipment is the problem.
The dyno is for someone who is looking to get the most out of their engine or someone who has modded the engine enough where it does need to be fine-tuned just to run correctly.
BTW ~ It's not just V-8's. We have many folks here who mod stock and other swapped engines and do not tune them on a dyno.
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Pyrthian
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JAN 09, 02:14 PM
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| quote | Originally posted by Oreif:
That is incorrect. I have a crate engine rated at 355hp and it puts down 309 rwhp. That is only a 12-13% loss which is easily attributed to typical driveline loss of a transaxle.
The thing is that some don't take into account is when things get modified power changes. If you take a crate engine designed to have a specific set-up and you change the set-up, Then you have no clue what the power is and depending on the mod, you could lose power. You really do not need a dyno run to tune the car for typical street driving with a standard crate engine. I doubt any crate engine that is set-up as recommended would have a 30% loss in power. Most crate engines should be +/- 5% of their rated power. If not then something else like a poor mod or a bad equipment is the problem.
The dyno is for someone who is looking to get the most out of their engine or someone who has modded the engine enough where it does need to be fine-tuned just to run correctly.
BTW ~ It's not just V-8's. We have many folks here who mod stock and other swapped engines and do not tune them on a dyno. |
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really? your power isnt between its rated power & 30% below that? sounds like it is.
it is VERY easy to lose ALOT of power thru poor intake & exhaust. like you said: as recommended.
here is an example otherwise: http://videos.streetfire.ne...389-9a1b01899174.htm
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Oreif
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JAN 09, 03:28 PM
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| quote | Originally posted by Pyrthian:
really? your power isnt between its rated power & 30% below that? sounds like it is.
it is VERY easy to lose ALOT of power thru poor intake & exhaust. like you said: as recommended.
here is an example otherwise: http://videos.streetfire.ne...389-9a1b01899174.htm
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Sorry, I was referring to the comment about the exhaust for a V-8 swap. Meaning that I don't have any power loss due to poor exhaust. I guess I should have stated that better.
As for the video, The engine was modified using a TPI instead of a carb like it was designed to use. The 350 HO really doesn't work well with a TPI attached to it.
(I also see Shaunna is messing with people's video's again. Kind of pathetic don't you think?)
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Pyrthian
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JAN 09, 03:37 PM
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| quote | Originally posted by Oreif:
Sorry, I was referring to the comment about the exhaust for a V-8 swap. Meaning that I don't have any power loss due to poor exhaust. I guess I should have stated that better.
As for the video, The engine was modified using a TPI instead of a carb like it was designed to use. The 350 HO really doesn't work well with a TPI attached to it.
(I also see Shaunna is messing with people's video's again. Kind of pathetic don't you think?)
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yup - sure is 
as far as I can tell, he's the whole cause of this thread....again.....but, so be it.
I could give a leaky squat either way. I like my car. ALOT. no internet weenie of any stripe is gonna change that.
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summerjim
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JAN 09, 11:17 PM
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| quote | Originally posted by Oreif:
The engine is rated at 355hp by GM, If I say I have 355hp and if I did not dyno it, would that be misleading? |
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Yes, it is misleading. It's rated at 355 horsepower in a certain configuration. You probably don't have the same intake, exhaust, etc that GM used when rating the engine. So your configuration could be substantially greater or less than what GM rated it at. We all know that tuning is the difference between a well-running car one that runs poorly.
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Oreif
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JAN 10, 06:51 AM
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| quote | Originally posted by summerjim:
Yes, it is misleading. It's rated at 355 horsepower in a certain configuration. You probably don't have the same intake, exhaust, etc that GM used when rating the engine. So your configuration could be substantially greater or less than what GM rated it at. We all know that tuning is the difference between a well-running car one that runs poorly.
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The intake is the same. It comes with the engine. I am using an Edelbrock carb instead of a Holley but generally carbs of the same size but different manufactures do not make any difference when tuned to the engine. I personally don't think it is misleading because the 355 hp rating is at the crank and the 309 hp is at the wheels. There will always be drivetrain loss which depending on the type of trans and the particular set-up can be anywhere from 10% to 20% for a manual and up to 30% for an automatic. (Generally speaking)
I may not have the same exhaust manifolds or set-up that they used, But it must be very close in flow since there seems to be very little (if any) loss due to the exhaust.
Although a new Corvette is rated at 405hp, Do you really think if you run the car on a chassis dyno that it will read 405hp?
(They are running 310 to 345 to the wheels on chassis dyno's per the Corvette forums.)[This message has been edited by Oreif (edited 01-10-2008).]
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BillS
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JAN 10, 09:57 AM
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| quote | Originally posted by Pyrthian:
ever see the movie Spinal Tap? it goes to 11. you can spout all your stats & truth all day long - dont matter. that one had a V8. it goes to 11. yours is cute - but that had a V8. |
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Yup, American car guys can be pretty single mindedly blind about anything but what they think is best.
Doesn't really matter what engine configuration is, the performance of the car is what is paramount. There are a lot of 6 cylinder high performance engines around today - and 4 cylinder! Anyone managed to stuff a Subaru WRX engine into a Fiero yet. Or an Eagle Talon turbo?
As an aside, I once couldn't resist doing the cylinder thing on a guy I knew. He owned a Lamborghini Gallardo - V-10, beatiful car, if he only hadn't insisted on talking about it all the time. I finally allowed as how it was a nice car, but I'd always had a hard time thinking of anything less than 12 cylinders as a real' Lamborghini. Shut him up, at least for that evening. He subsequently ended up selling it as he just didn't get much use out of it - no fun to drive in town, couldn't leave it parked for worrying about whether some envious git would key it, and he didn't get a chance for a road trip very often. (I feel the same way about a couple of my cars I don't use much, but I can't bring myself to part with them!)
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Newbfiero
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JAN 10, 10:05 AM
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LMAO ..Yeah that would of help me for sure 
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