[DJKING]

well im going to go for it. My first mustang build. decided to go with a 351 roller block with the following upgrades. I'm wanting to setup for a s/c down the road. Could some of you pros give me your honest opinion on my "planned setup."


1)TFS-51404221 TRICK FLOW Twisted Wedge Pistons 10.0:1 comp.

2)TFS-51402001 Track Heat Hydraulic Roller Camshaft
3)TFS-K514-350-370 Track Heat top end kit

I've been doing my homework and just want to clarify some things

1) 61cc chambers are recommended for a s/c setup. Is this fine until I'm able to afford the s/c?
2)Is the compression too high on those pistons to work effectivly with a s/c?Should i go with the TFS-51404330 8.5:1 comp

3)please any opinions woulld be appreciated....thanks in advance to the largest site of knowledge.

[angermgt]

sounds good. if you build for s/c now and dont get it until later its not gonna hurt performance before you get it. stick to your plan. good luck.

[sb2f5marine69]

total comp. should be 9.0:1 or lower depending on ur boost. Although ive seen guys run as high as 9.7:1 with 16lbs.

[8A_Honda]

I'd go with the 8.5:1 compression. Having it that high won't give you much room for tuning without knocking. You'd be having to either keep the boost low, octane always high, or both. Lower compression also allows for more boost.

[DJKING]

Thanks for the crazy fast reply.....it's only been a couple of mins

so your suggesting go with the 8.5:1 comp then?
also how does the comp affect pump gas and octane levels....just curious

[DJKING]

8A HONDA...You answered well i was writing, okay so 8.5:1 sounds good. man this is going to be fun

[8A_Honda]

Yes, I'm suggesting the 8.5:1. I'm new to Mustangs but not new to the forced induction world. Had a Talon that was pretty built with a 2.3 liter stroker and T-67 turbo. Plan on slapping the T-67 on my stang sooner or later.

The higher the octane, the lower the flash point. If you have too low of an octane, the fuel will want to pre-ignite. Which is knock which will blow up a perfectly good motor. Forced induction motors run a lot hotter than an n/a motor. The more boost, the higher the octane needs to be because of course you're pushing more air into the same amount of space which will get it even hotter. The plug gap would need to be narrowed to keep from blowing out the spark as well as going with a colder range spark plug...again to keep from knocking.

A higher compression will give you more power yes, but with higher compression and then add in forced induction, that's a lot of pressure and heat to try and tune safely without blowing it up. Some people might run higher compression yes, but might not be doing safely or maybe not easily.

P.S. Investing in a wideband would be a VERY wise investment.

[DJKING]

what is a wideband? should i know what this is?

[8A_Honda]

A wideband tells your air/fuel ratio. It's what dyno's use to tune with. Leaner equals more power. But too lean gets the exhaust so hot you can literally melt engine internals. Rich equals less power but safer. There's plenty of places that sell them. It's a MUST for tuning any forced induction motor unless you just have the guy at the dyno tune for a safe tune and leave it alone. But me personally, even if a guy at a dyno did the tuning, I'd wanna always keep an eye on it.

[DJKING]

with the camshaft i've chosen it says a min of 9.5:1 comp will this be okay with the 8.5:1 comp ratio?

Thanks

[8A_Honda]

I'm not sure about the camshaft to be honest but also, that's probably noted for a car that's n/a...as most are. Regardless, if you're going forced induction and you're building a motor for a future s/c, you'll want lower compression. The 9.5:1 compression needed may not matter once the s/c goes on. They're probably saying that because the cam might be so big that it needs the higher compression to take advantage of the cam. That's where the s/c would counter act the lower compression.

What s/c are you planning on going with anyway? Personally, I'd go with a Kenne Bell or a Procharger. www.kennebell.net has a LONG faq list that'll answer many of your questions. Hope that helps some.

I already have a T-67 turbo laying around so figure I'll just go ahead and use it. Otherwise it was gonna be Kennebell for me.

[DJKING]

thanks for the help. will look into the recommeded s/c. anymore suggestions?

[94' Cobra 351]

Why not stroke the 351 to a 408 or 427 and make just as much power as the 351 with a supercharger but naturally aspirated?

[8A_Honda]

Or he could stroke it AND go s/c

[94' Cobra 351]

Originally Posted by 8A_Honda Or he could stroke it AND go s/c

When he could make over 600HP on a naturally aspirated engine, why supercharge it? That is more than enough power! IMO

If you aren't satisfied, (which I don't see that happening, you will have so much torque you will have trouble hooking up in third and maybe fourth gear) then put a nitrous kit on it!

My suggestion: 351W stroked to 408, 10.5:1 compression pistons (forged of course) and make sure its a four bolt main!

[8A_Honda]

Well, either would give him plenty of power. It pretty much just depends on what he's wanting and his goals...and a lil bit of knowledge either way ya look at it, unless he's letting someone else do all the work.

[DJKING]

thanks guys for all the input, have decided on a 10:1 comp on a 251w block, forged internals, tf pistons/cam/and top end kit. Will be s/c down the road, i just might want to have the fuel economy someday, and would like the option of removing the s/c. Would be a lot more work to unstroke it if i wanted to at a later time. Like you guys said...tons of options....this one works for me. Thanks again for your thoughts and opinions.

djking

[Ninjlrd32]

yea man im looking to install a 351 in my '99. but its gonna be expensive. Im planning on cramming a man o' war 351 into my mustang and later adding the s/c, but the block alone is gonna cost me a lot. around 5k for the block at Jegs and then i need heads, an intake, exhaust, transmission since mine is about ready to collapse, wiring harness, ugh. im looking at a hopeful maximum of 10 grand. though ive been told i really dont need the mow block because i could get away with something not so bulky and not worry about the block cracking, but i dont want to risk it and would like to know that the chances of my block giving me headaches due to too much boost.

but going with the 251 isnt a bad decision either, you can get those things pretty fast. anyway, good luck with your swap and let us know how it goes[/url]

[94' Cobra 351]

Whats a 251W??

If you are thinking about adding a supercharger I wouldn't set it up at 10:1 CR. That is a little high unless you aren't going to run very much boost. but otherwise it sounds like it is going to be a sick car man, good luck!

http://www.moddedmustangs.com/forums...t-vt19092.html

I have been planning on how much it will cost me if my engine goes and my figures are around 10k Which is more than what I paid for the car!

[flamed 98 gt]

I am sure that he ment 351w. I am planning pretty much for the same but the 408 turbo version maybe even a t88.