308 with AFR 185's

BaBysARM · Feb 13, 2008

i have srp forged pistons and X-cam 1/6 rr ...... i have read the posts and most people like the 165's for my setup. but is it going to be a difference between 5 or 50 hp.?

Well guys what do you think ...is this why my car is so slow. or is it the tune

5spd GT · Feb 13, 2008

The AFR 185 heads are not hurting you. It is just a mismatch of parts. Mainly the camshaft...

What kind of track times and dyno numbers do you have?

Sometimes it is the driver...

What rpm you shifting at? Timing? Fuel pressure?

BlackVert · Feb 13, 2008

and did you get a tune?

i have an engine building book where they put 185s on a 302 with an OTS comp cam (forged shortblock) and a 750 carb that made 450 horses

the 185s is not your problem

dartvader · Feb 13, 2008

that thing should rock with the 185's, what intake do you have ??

BaBysARM · Feb 13, 2008

factory cobra with the lower ported

DDSTANG94 · Feb 13, 2008

cam/intake

BaBysARM · Feb 14, 2008

im thinking maybe buy a Tweecer with my tax money....and what do you think about advancing my cam for more low rpm power?

Venom351R · Feb 15, 2008

Im in the same situation as you. I have a set of AFR 185's on my 351W but I have a cobra intake (extruded/honed) but its still choking the potential air flow of the AFR's. I know the engine is huffing for air at the end of track runs b/c the Cobra intake just wont produce power as far in the RPM range as the AFR's do. It does not matter which set of heads you have on the car if your cam and intake selection do not match it. Im getting a Trick flow R intake to fix the problem.

BlackVert · Feb 15, 2008

BlackVert said:
and did you get a tune?

+1

PUNISHER RACING · Feb 15, 2008

why 30's? and how slow is it?

BaBysARM · Feb 16, 2008

what about a comp 284hr..........?????

BlackVert · Feb 16, 2008

the 450hp one i was referring to in my earlier post had a comp xe-282 cam

DDSTANG94 · Feb 16, 2008

get a custom cam...its not much more $ than the comp cams xe series

dartvader · Feb 17, 2008

I would call Ed and order a custom cam and those heads flow like 270 cfm, you need an intake that flows as much or close to those heads, holley systemax 2 or a fully ported upper lower edelbrock performer rpm by T- Moss would be sweet.
oh and 4:10 gears and a tune, now you got a whole different beast
just my 2 cents........

95Vert · Feb 17, 2008

The cobra intake, especially extrude honed, can keep up, if not outperform many aftermarket intakes right up to 6200rpm. So if your rpm range is around there, I wouldn't worry about the intake. Hell, even if you want to upgrade to a better flowing intake, why not get the bread box on that gt40 and call it a day?

Cam would be the first thing I would worry about. That is the most critical part of an engine, it's even been reffered to as the brain of the engine. My cam is set up with a shift point of 6400 rpm's, and this is with my long runner cobra intake. It'll be higher once I install my bread box on there.

The injectors are fine.

Good read....

http://www.tmossporting.com/tabid/3451/Default.aspx

black94gt50 · Feb 17, 2008

I agree with 95 vert the injectors are more than fine, always better to have bigger than too small, those heads are not the problem, the cam is probably way mismatched for those heads and the intake as it sits int the best choice, a ported lower gt-40 and box upper would do good, as well as one of the larger aftermarket manifolds such as the trick flow track heat, or holley. I'd think the cam and springs are the biggest problems as of the moment. Just my opinion.

BaBysARM · Feb 17, 2008

the lower is ported and has 1" spacer..and the original valve springs that came on the AFR's have been removed and triple springs installed.

95Vert · Feb 17, 2008

Why do you have the spacer? VC clearance or rpm range 'control'? Why such a stiff spring? You may be binding the lifters causing an unstable valve train. Do yourself a favor and get in touch with Jay Allen at www.camshaftinnovations.com and get yourself a custom cam, and he'll tell you everything you need.

Nagash01WS6 · Feb 18, 2008

BaBysARM said:
the lower is ported and has 1" spacer..and the original valve springs that came on the AFR's have been removed and triple springs installed.

What springs are they?

I bet your cam is way out of wack.

BaBysARM · Feb 21, 2008

well im going to put a wolverine 1087 cam in it. I hope that solves my problem

308 with AFR 185's

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