HP out of a twin plug 3.4L?

[GaryR]

CORRECTION - it's a 3.2SS!!
I have a motor that was built up by a well known shop but i'm having trouble getting info on it so other than the obvious it's a guess for now. I keep getting the "how much HP?" questions, which I of course also have no clue about. I figure this engine has been built enough (in general) to have a range of what to expect (and i'm pretty sure, having said that, I will be wrong) to get some opinions. Here's what I think I know -

3.2L
Max Moritz 98mm pistons/cylinders
S Cams
40mm intakes
Twin plugged heads, polished and flow tested
Weber 46MM carbs
S cams
SSI's with B&B SS free-flow exhaust
Electromotive Crankfire ignition (no distrib)

This is it just out of the doner car-

[cgarr]

What CR?

[GaryR]

10.5:1 (from what I am told.... )

[kenikh]

What's a "mid-range" cam? Lotsa plug wires, so I'd assume 10.5:1 CR. What kind of ignition?

[GaryR]

Originally Posted by kenikh

What's a "mid-range" cam? Lotsa plug wires, so I'd assume 10.5:1 CR. What kind of ignition?

No idea, that's the description I got. As it supposedly is very streetable I would say it's somewhere between high-lift long duration and stock..

Electromotive twin plug crankfire ignition.

I'm not looking for some sort of clairvoyant dyno here, just what ranges a well built 3.4 would put out, i.e 230-275, 210-250, etc. etc. I'll get it dyno'd when installed, i'm just curious and it seems to be the one question everyone asks.

[Jeff Alton]

300ish give or take. My 3.4 is similar, with bigger exhaust primaries and 48mm ITB's and EFI, made about 300-310hp at the flywheel.....

Cheers

[GaryR]

Thank you Jeff, so I will assume 250ish and most likely be in the ballpark.

[safe]

You exhaust might be a little restrictive, but I would have been very disappointed with 250. My stock euro 3.2 with headers and ITBs puts out ~265 fwhp.
I would also guess around 290-310.

[GaryR]

I was kind of curious why he stayed with SSI's that dump into a 2" B&B maxflo muffler (with 3" outlets!).. guess that was the only heat option at the time. I'll post back once I get it on the dyno, be fun to know exactly what the RWHP number is..

[GaryR]

OK, got a little more info to add if it matters.

Max Moritz 98mm Pistons and cylinders
S Cams
40mm intakes

[Jeff Alton]

Is it a 3.2 SS or a 3.4? Do you know what crank is in it? What about the case, does it have a sump cover?

Cheers

[GaryR]

It's a 3.2SS, 3.0L crank, yes it has a sump cover (assume it's a machined 3.0L case?).

[onboost]

3.0L case + Max Moritz (98mm) = ss 3.2

Unless using 3.2 crank etc..

[GaryR]

Well, if Dan Jacobs says it's a 3.4... it's a 3.4. He mentioned it was big $$ to build.
Didn't yet ask him about crank and rods.

Edit: He corrected that today, it's a 3.2SS... he apologizes for the misinformation.

[Jeff Alton]

The 74.4 crank drops right into the 3.0 case. The only reason I asked is that the MM 98's were common for 3.0 motors which did make them 3.2SS.

But anything is possible, today I corrected some issues on a 3.5 that the owner had built on a 3.0 case.

Cheers

[tlarocque]

Don't mean to hijack thread but wondering, Jeff Alton, if your car is still for sale. I PM'd and emailed a couple times but never got a response.

If still avail., please send me a PM or email to tlarocque@cox.net

Thanks.

[Jeff Alton]

Sorry I missed your contacts, I will email you tonight.

Hi-jack over, Gary, let me know if you need any comparo info...

Cheers

[GaryR]

Originally Posted by Jeff Alton

Sorry I missed your contacts, I will email you tonight.

Hi-jack over, Gary, let me know if you need any comparo info...

Cheers

Thanks Jeff, I hope to have her mounted in her resting place in about two weeks and running so i'll see what happens after that. I race a 175HP stock 3.0L so I would think this motor should impress even though I did have a 300+ HP turbo a while ago...

[GaryR]

Originally Posted by GaryR

Well, if Dan Jacobs says it's a 3.4... it's a 3.4. He mentioned it was big $$ to build.
Didn't yet ask him about crank and rods.

Well, I guess I should say "If Dan Jacobs says it's a 3.2SS then it's a 3.2SS!!" He just got the word and apologized for the misinformation... me too!

So what HP can I expect out of a 3.2SS?

[joetiii]

I will be building a similar engine this winter. I believe the MM 98mm P&Cs measure at 9.8:1. Though I have heard there are higher compression MMs. With a mod S cam and twin plug I would be conservative at guessing 265 horsepower.

You are correct in that the new motor will give you a a very noticeable shove