i was wondering what kind of N/A power can be had with a 3.4? i was thinking about destroking it to a 3.1, boring it to a 3.2, changing the exhaust cam timing, raising the compression to like 11:1 having balanced and blueprinted, port and polish, maybe headers, power pullies, and computer tuning. i want to shoot for 8K+ RPM's and 250-275 HP with 225 FT lbs.

-Fish

This engine was on display in Detroit some time ago. A prototype version made 281 hp N/A. It had an upgraded computer, and VVT or Variable Valve Timing. Not dis-similar to the 3.6 DOHC being released soon the the Caddy world in 2005.

Here is a great link for ya..

http://www.angelfire.com/ca2/34Performance/

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[This message has been edited by intlcutlass (edited 07-19-2004).]

You can get 240 just by changing the timing, more if you get cams cut for it. Surely a Port and Polish job would do wonders on a high revving engine like this. Im sure there are other improvements to be made, but I think destroking is moving in the other direction, theres no replacement for displacement. You'd loose torque and power by destroking it, you might be able to get that power back in the top end, but honestly I dont think it would be worth it. You would have to custom make an intake(which has been done, with good results), and headers, plus worry about a lot of other things to raise the red line that much. If you want to build a $5000 racing engine, go for it, but if you just want a fast car, Id stick with more conventinal approaches, especialy if you want off the line power. I think cam timing and a good P&P job would do wonders.

chris west has one.i never drove it and i don't know spit about em but he would have info for you.

So will it be possible for me to build a 3.4 to rev to 7500 RPM and make 250 HP? what's the highest revs that a 3.4 can handle without too much trouble?

-Fish

Bump

gee i wonder who originally came up with the destroked TDC idea....oh thats right it was me....

u can't bore it out to 3.2 liters...there won't be enough cylinder wall thickness left. the biggest you can go is like 3092cc's (i have to break out my notes for the exact #). using N* pistons w/ 6" 327SBC rods and the 2.8 alum head crank (cheapest way) will give u 8.2:1 C/R. before u say slap a turbo on it...it won't work the quench area is shitty to say the least. the only way to go is to get 6.035" custom rods made with a 60* V6 big end and a SBC wristpin on the small end. then get custom forged slugs made to get the compression to 12:1 and use a lightweight SBC wristpin. then you get low tension rings and have the 2.8 alum head crank cyro treated, shot peened and polished and finally balance the entire reciprocating assembly. for the block you're gonna need a custom made main girdle along with ARP studs/bolts EVERYWHERE to hold it together above 7k rpms. your gonna need trimetal bearings for it otherwise it won't make it over 7k rpms more than once or twice and your oil clearances need to be set ULTRA TIGHT.

now onto the heads, you're gonna need more than a simple port and polish job. you need to send your heads over to DKOV and have him reshape the intake ports and port the crap out of the exhaust ports, you might as well spend $25 a valve and have manley custom make you stainless steel oversized valves and have the spring pockets machined for at the very least double valve springs with titanium retainers/locks. then you're gonna need long tube equal length headers with probably 2" primaries to flow enough for the motor @ 9k rpms.

cams are a chapter on their own pretty much no one will make cams for you and you can't get billet ones made because billet only works with roller valvetrains so unless someone will re-grind the stockers...you're pretty much f@cked.

you'll want a getrag w/3.94final drive and torsen LSD for the trans.

you're gonna need to modify a cloyes true double roller timing chain to work on the TDC's intermediate shaft.

in the end you get a motor that'll probably hit 9k and do it reliably but the T-belt will need changed every 10-15k miles and god forbid if it ever breaks you're in a world of $hit.

bottom line.....

ITS NOT WORTH IT!

believe me i looked for every possible way to do it and it's just not worth it. build a nice 3100-3400 with a turbo or nitrous and spin it to 7k all day long....trust me

quote Originally posted by coinball: gee i wonder who originally came up with the destroked TDC idea....oh thats right it was me.... u can't bore it out to 3.2 liters...there won't be enough cylinder wall thickness left. the biggest you can go is like 3092cc's (i have to break out my notes for the exact #). using N* pistons w/ 6" 327SBC rods and the 2.8 alum head crank (cheapest way) will give u 8.2:1 C/R. before u say slap a turbo on it...it won't work the quench area is shitty to say the least. the only way to go is to get 6.035" custom rods made with a 60* V6 big end and a SBC wristpin on the small end. then get custom forged slugs made to get the compression to 12:1 and use a lightweight SBC wristpin. then you get low tension rings and have the 2.8 alum head crank cyro treated, shot peened and polished and finally balance the entire reciprocating assembly. for the block you're gonna need a custom made main girdle along with ARP studs/bolts EVERYWHERE to hold it together above 7k rpms. your gonna need trimetal bearings for it otherwise it won't make it over 7k rpms more than once or twice and your oil clearances need to be set ULTRA TIGHT. now onto the heads, you're gonna need more than a simple port and polish job. you need to send your heads over to DKOV and have him reshape the intake ports and port the crap out of the exhaust ports, you might as well spend $25 a valve and have manley custom make you stainless steel oversized valves and have the spring pockets machined for at the very least double valve springs with titanium retainers/locks. then you're gonna need long tube equal length headers with probably 2" primaries to flow enough for the motor @ 9k rpms. cams are a chapter on their own pretty much no one will make cams for you and you can't get billet ones made because billet only works with roller valvetrains so unless someone will re-grind the stockers...you're pretty much f@cked. you'll want a getrag w/3.94final drive and torsen LSD for the trans. you're gonna need to modify a cloyes true double roller timing chain to work on the TDC's intermediate shaft. in the end you get a motor that'll probably hit 9k and do it reliably but the T-belt will need changed every 10-15k miles and god forbid if it ever breaks you're in a world of $hit. bottom line..... ITS NOT WORTH IT! believe me i looked for every possible way to do it and it's just not worth it. build a nice 3100-3400 with a turbo or nitrous and spin it to 7k all day long....trust me

Well, i'll just take your word for it. So what kind of power can be had with turboing it? and does anyone have any useful info on how to do it?

-Fish

[This message has been edited by cooguyfish (edited 07-20-2004).]