Dissappointing 331 Dyno

speeddemon40 · Dec 15, 2003

Ok...I finally got my 331 dynoed the other day...After allittle messing with FP and Timing it made 330/360. I know with more tuning it should be able to make a little more, but the guy running the dyno told me I should get a new intake, 75mm throttle body, 80mm MAF, 1 3/4" headers, 3" exhaust, and bigger power pipe and possibly new heads. what do you guys think? what intake/heads should i put on there? The TFS R intake with AFR 185s?
Thanks
BTW cam specs are 536/560 224/226 112 LS

Black331Stang · Dec 15, 2003

u will be fine with teh 70mm TB but maybe the mass air upgrade to 80mm is a good idea..and i woul def reccomnend AFR 185s and a custom cam...

o and whats that hits4pay thing? ive seen it alot..does it work

Silver88gt · Dec 15, 2003

Dont be too disappointed. My untuned 331, w/Vic. Jr heads, 230 232 602 602 cam, 10.1 comp, TFS R intake, 80mm PROM, 1 5/8 Long Tubes.. 370rwhp 360twtq

DirtyD916 · Dec 15, 2003

ya does the hit 4 money bull$hit really work???

2MuchPSIForU · Dec 15, 2003

go to the track

N8Miller · Dec 15, 2003

I dont think that those are bad numbers at all. you said that there was more room left, so be optimistic about it.

jdallen1798 · Dec 16, 2003

Those Arent Bad Numbers Probably Just Need A Little Tweaking.i Have The R Intake But Have Out Of The Box Rpm Heads And Sure I Would Benefit Greatly From Some Port Work And A Custom Cam.

SmockDoiley · Dec 16, 2003

why are you saying dont be disappointed when your bragging about your 331 making 40 more horses?

EMW150 · Dec 16, 2003

First thing I see is your BBK headers. Did you port the hell out of them? They are very restrictive at the flange from the factory. If yours are 15/8" that's even worse. I used to run their 13/4" but before I put them on I ground the welds out of the inside of the flanges. The welds stuck way out into the ports. They also have a pretty small collector (less than even 21/2"). If you can swing it, put a set of Bassani 13/4" to 17/8" steps on it with an X-pipe and 3" all the way back. On an N/A engine, exhaust gotta flow and scavenge to put up the numbers. Don't be disappointed, it takes a while to get this stuff dialed in. I think you could use some more cam also.

Rick 91GT · Dec 16, 2003

EMW150 said:
First thing I see is your BBK headers. Did you port the hell out of them? They are very restrictive at the flange from the factory. If yours are 15/8" that's even worse. I used to run their 13/4" but before I put them on I ground the welds out of the inside of the flanges. The welds stuck way out into the ports. They also have a pretty small collector (less than even 21/2"). If you can swing it, put a set of Bassani 13/4" to 17/8" steps on it with an X-pipe and 3" all the way back. On an N/A engine, exhaust gotta flow and scavenge to put up the numbers. Don't be disappointed, it takes a while to get this stuff dialed in. I think you could use some more cam also.

Bingo.... I agree with Eric, and I've seen the headers nasty. The cam is too small but I see no reason why you can't make more power with the current set-up, the 80mm and Power Pipe wouldn't hurt since they read better. You are not going to pick up a huge amount by swapping TB's, whats the compression ratio? Hows the curve look, HP and TQ?

Remember Dyno numbers aren't gospel, take it to the track and see how it runs. It will take time but once it all is dialed in and you get good clean runs then you can start making decision of what to change.

perkys stang · Dec 16, 2003

Why change the heads?? That's crazy talk..

Needs a good cam in there as that cam with the cubic inch is to samll and I would go for a 75mm TB and a 80Pro-M... Maybe even try ditching the Power pipe and trya straight piece.. I here it's worth a few HP....

As for the exhaust I am sure that would pick the car up some also.. This would be a good start.. I think the Intake is fine... The vortech is basically a holley and it should work great...

bored&stroked · Dec 16, 2003

SmockDoiley said:
why are you saying dont be disappointed when your bragging about your 331 making 40 more horses?

Because you still made good numbers and not every engine combo makes the same power, even using the same components. You can't expect to dulicate #'s. And it didn't seem like he was bragging to me, more like showing what can be done.

speeddemon40 · Dec 16, 2003

Thanks for the responses guys... The only thing done to the heads are the upgraded springs. I think I may have been mislead by FPS on what power the setup would really make. They built the shortblock for me and recommened that cam based on what parts i was going with and that I was gonna put a 150 shot on it. The compression is 10.25 with these heads. The headers are 1 5/8" and but i did grind out some of the nasty weld from the inside of the flanges.
Thanks
Ken
BTW the curves looked real good..it made 300 tq starting at 3200 rpm and was smooth all the way up and it made over 300 hp at 4500 rpm. I'll post my graphs when i get back in town.

Kid wita 5oh · Dec 16, 2003

speeddemon40 said:
Thanks for the responses guys... The only thing done to the heads are the upgraded springs. I think I may have been mislead by FPS on what power the setup would really make. They built the shortblock for me and recommened that cam based on what parts i was going with and that I was gonna put a 150 shot on it. The compression is 10.25 with these heads. The headers are 1 5/8" and but i did grind out some of the nasty weld from the inside of the flanges.
Thanks
Ken
BTW the curves looked real good..it made 300 tq starting at 3200 rpm and was smooth all the way up and it made over 300 hp at 4500 rpm. I'll post my graphs when i get back in town.

dont feel bad bro, my 351 combo made the same numbers as yours......so your makeing more power per cube than me....

Notchbck93 · Dec 16, 2003

You musn't forget that is rear wheel horse. Realistically you around 400 on engine.. that is great for a 331!

Silver88gt · Dec 16, 2003

SmockDoiley said:
why are you saying dont be disappointed when your bragging about your 331 making 40 more horses?

WTF... Who said I was bragging. I think that my combo should make way more.. A bigger head, intake, and cam and only 40 more. Come on.

speeddemon40 · Dec 17, 2003

Notchbck93 said:
You musn't forget that is rear wheel horse. Realistically you around 400 on engine.. that is great for a 331!

Thats true...I didnt even look at it like that..
Thanks,
Ken

usedtobe 67p51d · Dec 20, 2003

331/afr185 10-1 compr. custom comp cam-hyd roller,roller rockers,750 dblr pumper,airgap rpm,1 15/8" jba shortys msd everything 343 rwhp@ 6800! but only 326 # of torque

Dissappointing 331 Dyno

speeddemon40

Black331Stang

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Silver88gt

DirtyD916

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2MuchPSIForU

N8Miller

I need NOS....make it 2 of the big ones

jdallen1798

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SmockDoiley

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EMW150

Rick 91GT

Mustang Master

perkys stang

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bored&stroked

speeddemon40

Kid wita 5oh

I'm definitely not in the original hole

Notchbck93

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Silver88gt

speeddemon40

usedtobe 67p51d

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Dissappointing 331 Dyno

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I need NOS....make it 2 of the big ones

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I'm definitely not in the original hole

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