Thread: HP & Torq

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Can anyone tell me what this set up would generate roughly? Would vortec heads add much power?


ported and polished tbi heads 14102193
65.3cc COMBUSTION CHAMBER 1.94" INTAKE 1.50" EXHAUST VALVE
260 Comp Cams 12-210-2
hei dizy (tuned for that motor
victor jr intake
650 cfm edelbroc carb 4 barrel
hydraulic lifters
shorty headers *

Thanks!

Well, welcome to the club! You need to give us a little more info. An important one would be compression ratio. Is this a truck motor?

Keith

Engine size would not be a bad idea either.

duh, sorry. I guess i just assumed small block is 350. it's not stroked or anything. From what I can tell, the bottom end is stock with the 8 or 8.5 compression ratio, then a mechanic told me with the heads it raises to 9.5.

HP peaks 243HP at 4000RPM, and torque peaks at 379TQ at 2000RPM and drops off from there. It's at 318 by 4000RPM, 217 at 5000RPM, and falls flat from there. I imagine your Jeep with the current setup isout of juice by about 3500 to 4000RPM.

Here is what someone else told me, is this right?!

I believe the heads are truck heads. The block I was told is from a 72. That's really all I know. I bought this already installed in a 97 Jeep Wrangler TJ, and am just repeating what I was told. But he also told me it made 380hp and 400tq on the dyno

duh, sorry. I guess i just assumed small block is 350. it's not stroked or anything. From what I can tell, the bottom end is stock with the 8 or 8.5 compression ratio, then a mechanic told me with the heads it raises to 9.5.

HP peaks 243HP at 4000RPM, and torque peaks at 379TQ at 2000RPM and drops off from there. It's at 318 by 4000RPM, 217 at 5000RPM, and falls flat from there. I imagine your Jeep with the current setup isout of juice by about 3500 to 4000RPM.

Here is what someone else told me, is this right?!

You are limited by the TB heads. If you can get everything you need to use Vortec heads I would go that route. I think 380Hp on the dyno is pushing it. Without the dyno sheet to prove it he's just talking smack. I have a stock '94 Silverado, 350 TBI, I'm guessing it has 250Hp and pretty much is done at 4000 RPM, I know a cam will not add 130HP. Just my 2 cents.

Keith

With the info given above............260hp max.... with 300-310ftpnds.
Ditto on what has been said about the 193 truck(swirl port head) heads. The heads just wont build the numbers above 40-4500rpms. Replace them with something better.

I've been reading articles like this : http://www.popularhotrodding.com/eng...ons/index.html

that say you can substitue ANY sbc 350. mine i believe is the old style, and I think was rated under 200 hp. the engine they build off of in the article was rated at 290! Is that all because of the cam?! Can I truly subsitute my engine for that performance one? Would I end up with the same power numbers, or are there other differences?

I am no pro ,but I would guess under 300 hp and about 360 ftlbs of torque .

Those heads seem to be not soo good ,now I have talked myself into give or take 275 hp.

It`s all just a guess from my end though.

I would imagine it would climb rocks well at low rpm or pull a heavy load at freeway rpms very well.

Can anyone tell me if these heads : http://cgi.ebay.com/ebaymotors/CHEVR...#ht_1787wt_937

would work as the EQ Vortec heads Enginequest CH350C
featured in this article? :
http://www.popularhotrodding.com/fea...ine/index.html

the intake and runners are just a little smaller. does that make much of a difference?

Originally Posted by blwn31

I'm guessing it has 250Hp and pretty much is done at 4000 RPM,

Exactly what I was thinking. The heads will work well in an idle to 4000 rpm motor. That's what they were designed to do.

A while back, I tried to get all the EQ cylinder heads together in one place, but there is conflicting information and so many different part numbers that it made me nuts and I quit trying to catalog them.

I thought maybe the CH350C would be a decent street head. It supposedly has 180cc intake runners and 62cc chambers, but I found the flow numbers on them and they look much inferior to the L31 Chevy heads.

I guess when push comes to shove, for a zippy 350 street motor, it's gonna be hard to beat these cast iron 170cc Pro Torker heads from Racing Head Service....
http://www.summitracing.com/parts/RHS-12410-01/

Thank you so much "tech inspector". I've really learned a lot - especially giving me the hookup for the quadrajet.

so these torker heads would replace and work for that build that I posted w/o too much difference/loss in hp or torque?

Originally Posted by whabamdo

Thank you so much "tech inspector". I've really learned a lot - especially giving me the hookup for the quadrajet.
so these torker heads would replace and work for that build that I posted w/o too much difference/loss in hp or torque?

What impresses me is the power that can be produce with them in a very streetable package. For instance, a 350 with 9.00:1 static compression ratio, 750 carb on RPM intake, 1 5/8 long tube headers and mild CompCams 12-234-2 camshaft will make 430 hp and 450 ft/lbs of torque.
http://www.summitracing.com/parts/CCA-12-234-2/
I wouldn't use a flat tappet cam, but would use pretty much the same specs in a hydraulic roller.

is there an article or a writeup that you got those numbers from?