QuicksilverRS

I didn't get much response last post so I figured I'd try again. I've got an LS1 block bored 10 over and I'm wondering if it would be worth it to go ahead and put the 4.000 crank in it and make a 383 when some people I've talked to claim that they didn't get a significant power increase over the stock bore and stroke (or in my case a 347). Any opinions?

383ss

iTrader: (14)

what are your goals???

QuicksilverRS

Well, I'd like to see some performance on the strip. That's for sure, but I'll also be driving this puppy around town most of the time and so it needs to be streetable. Truthfully I like the sound of having a 383, but if I'm going to be seeing almost exactly the same numbers with a good set of pistons, some good heads, and a high performing cam then I guess there really isn't a point. If there is a significant difference then I'll go ahead with the 383. All things are possible right now as it's just a bare block sitting on my table so I figured I'd ask around for opinions and options.

DenzSS

It really isn't the same. A 383 stroker puts out a ton more torque, plus you get a forged crank. Perfect for a big power adder.

8POTS

A 382/383 has a lot to offer over even the best head/cam package.

The big prize is the amount of torque you'll make. There's an old saying :

"HP wins friends but it's torque that wins races"

And that's very true...but you ultimately need 'qubes' or a supercharger to get at it.
Internal mods are easier to hide from the Insurance ****....you can avoid the whole "no insurance for you !!" thing.

Also, you'll have your motor apart anyway ,so you can do all the good stuff whilst you're at it ....heads, cam, etc. That means gobs of HP AND torque.If you ever think you may like more displacement, hold off on doing just the heads and cam 'til your ready and... save, save, save. Less labour involved.

<small>[ September 12, 2002, 05:32 AM: Message edited by: 8POTS ]</small>

Ragtop 99

iTrader: (7)

If you aren't going to port the heads and do the other mods (e.g. LS6 Intake) because you spent all your money buying the crank, then your gains will not be great. Like others have said, your peak HP gains may be small (when compared to a H&C car), but a properly matched cam and heads on the stroker will provide a huge increase in midrange torque. This will allow you to run good times w/o as much gear (or using a smaller converter for an A4) and maintain excellent drivability.

For maximum strip performance, I like an all bore better combined with the right gearing.

Just my observations from a 346 man. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

383ss

iTrader: (14)

I have a 382 stroker making 448 rwhp and 439 tq with a small 224/244 .539 cam. It is very mild and sounds about stock.
From what I've seen most H/C 346's make about 400 rwtq. Strokers make up to 450 quite often. I hope to be there soon.

383ss

iTrader: (14)

here's my mods.

P&DZs

iTrader: (1)

I did H/C and TC first and was not happy with the feel of the car. The HP numbers were there but not at the RPM thats common during around town driving. I was looking for the tire frying low/mid range strength that makes you use the gas pedal softly. I went back for the Lunatti rotating assembly and I would go for the 382 right from the start if I were in to that decision again. The torque made available with the stroker and a very mild TC is terrific. You feel it all the time day in day out at "everyday" type RPM. Even before the FLP's, which were not yet available when I first got it, the car was a blast. I stayed mild on the cam too to keep tuning simple and "sleeper" in general nature. Dyno' numbers on peak HP aren't in the bragging rights area but the area under the curve is sweet. I still get 23/24 mpg on freeway trips and commonly 16/17 in mixed driving. E-mail me if you've got more questions.

grumpyvette

adding both stroke and displacement in most cases increases your compression at the same time. the addition of all three factors tends to make the engine perform better in that the torque curve moves higher. now the formula for hp is (torque x rpm/5252=hp) example, its quite normal to pick-up 30 ft lbs or more in torque with the increased displacement so.
400ft lbs @5000rpm/5252=380hp
but
430 ft lbs @5000fpm/5252=409hp
so yes its worth it and don,t forget that the engines output is normally in the 1.1-1.3 hp PER CUBIC INCH OF DISPLACEMENT so the extra 30 inches bye themselves adds to the potential power output

QuicksilverRS

Thanks a lot folks. This is really helping. Anyone else have an opinion?

RUF SS

Do the stroker!
Look at my sig for the mods!

99 Black Bird T/A

iTrader: (4)

The extra cubes can help "soak up" the big cams.

If you want it and have the $$$ go for it.

I think the extra low end torque will equal a very big fun to drive factor over just heads and cam, even if the peak numbers are within 15-30rwhp

badls1

iTrader: (1)

well i am running on 370 cubs, revs just little over 6800 rmp. last dyno was 453/429 on 4.10 gears. so which is about 465/429. well my heads hav lot of work in em. they flow about 330 cfm w/o loseing vlocity. its custon grind cam. so you could still make those same stoker number without spending stroker price. i would resarch a little before doing the stroker. their are lot og guys out their who dont have stoker kits but still make the same power. i would call mti up and see what they say. thier work is resnoable and the out come is unbelivable. most of my parts are from them and you could say i am happy with the results. if you want e mail me i ll kinda give you more deatils as what you could do to pull the same numbers w/o a stroker.

QuicksilverRS

Have any of you stroker guys had any problems with piston slap? I've heard the the stock LS1s have had this problem and I can imagine that putting a larger stroke wouldn't be helping the problem.

iron maiden

I have a question also...Would it be good worthwhile to get a stroker wit a lower compression and build for boost? Or shoudl u just go wit the stroker altogether?

AlonzoVersion 1.0

If it were me I would go with the stroker and put a solid roller package with it and spin that motor to the heavens.If you still arent satisfied then hey add nitrous.Iron Maiden its up to you what you use it for.I would go high compression with nitrous myself.