H/c/I, intake and inject question.

[Lone Sailor]

Chassis is getting attention too.

Strange 10 ways
Drag springs
Tubular k member
Tubular rear upper and lower control arms
Torque box welded
And new slicks.

What made you decide on slicks?

[91CoupeMike]

They flow really close to an afr 165.

The cam is the bottleneck so to say, I just want to see how it runs with it. If I feel like I can get another 15-20rwhp from another cam, then I'll do it later on.

I was wanting to degree the cam, but am clueless on where to start on getting it correct.

[Lone Sailor]

Hmmm, well I just figured that adding the additional fuel in the tune and keeping the stock fp was far better than asking an injector meant to flow at 39 PSI to bump up to 70+#'s. I have the knowledge to do it the right way. The way I do it is the right way. I know guys that make 400+hp on 19# injectors and a 12:1 FMU, but that certianly doesn't make it the right way.

If you're really running 30 pound injectors without a proper tune on ECM then you are probably washing down the cylinder walls with gas, which is bad. The fuel pressure at idle is part of the equation, but you can't adjust pulse frequency and width through a fuel pressure regulator, and that is much more important than pressure at idle. Only the computer can compensate for those parameters.

Well, I hate to have to tell you this, but those 30's that you're running, they're getting the same treatment on a dry shot of nitrous just as the 19's I was using, and any other size injector that is used with a dry shot of nitrous. Those dry kit systems work the same way regardless of the injector size. They all get hammered, just because one is capable of distributing "xx" amount of fuel doesn't mean they aren't subject to the way the nitrous system is designed to work. If you think the fuel pressure on those 30 pound injectors isn't jacked sky high when you flip that switch you're mistaken.

You say you have the knowledge to it the right way, and that you are doing it the right way, but that's subject to opinion.

[Diabolic]

More
My stock gt40s and e303 put down 267/304 granted there will be much more power under the curve with those heads but your crazy to think he is only going to get 275 out of those brodix heads.

Like I said maybe more. It's all about the combination. I personally feel the camshaft will hald him back a little. How does the flow of those Brodix heads compare to the flow of 170TW heads or AFR 165's. Actually the 170's would be better compared to the 185's, but they can be used without flycutting the pistons so I included them. I had the Lunati cam 51014(same specs basically), with Fox Lake ported TW170's, Systemax intake port matched, 70mm tb, 30# injectors, Pro-M 75mm MAF meter, and 1-5/8 Longtubes in my 89 Hatch. I put down 312 to the tires at Murillo Motorsports in San ANtonio. He told me the camshaft was really holding me back. It was done pulling by 5500 RPM. I also think that 1-3/4 Longtubes with a custom cam would net him an additional 20+rwhp. He seems to drive the piss out of that thing so who knows, he may just get that 7.6 if the weight is under 2900. Mph will tell the hp.

[91CoupeMike]

275 only because the camshaft is a tad small, and the compression is below 10:1. You could actually see more. Small cubes need RPM to make bigger numbers. More cubes need less RPM.

7.9@87mph with your good driving and decent traction. 1.7ish 60' time

Chassis is getting attention too.

Strange 10 ways
Drag springs
Tubular k member
Tubular rear upper and lower control arms
Torque box welded
And new slicks.

[FoxBodyNick]

275 only because the camshaft is a tad small, and the compression is below 10:1. You could actually see more. Small cubes need RPM to make bigger numbers. More cubes need less RPM.

More
My stock gt40s and e303 put down 267/304 granted there will be much more power under the curve with those heads but your crazy to think he is only going to get 275 out of those brodix heads.

[91CoupeMike]

Fixed.

I'll be happy with 7.60s and as long as it makes 300 rwhp il be all grins.

[Diabolic]

Whats you guys Rwhp estimate?

275 only because the camshaft is a tad small, and the compression is below 10:1. You could actually see more. Small cubes need RPM to make bigger numbers. More cubes need less RPM.

7.9@87mph with your good driving and decent traction. 1.7ish 60' time

[FoxBodyNick]

ET estimate?

Fixed.

[Diabolic]

The only place we disagree is that you seem to think bigger is better lol

I use to think that small parts make great tq. I've built several combos that way. I had tried bigger parts in the past only to be dissapointed. The problem was always in the tune, or lack there of. Trying to use "calibrated" MAF meters, advancing the timing with the dizzy, bumping the fp with a regulator, etc......... My personal daily driver is a 10.5:1 331 with cleaned up Vic Jr heads, 240 duration camshaft, .570 lift, Ported RPM II, 75mm tb, 90mm MAF meter, and 42# injectors. I swear to god it drives perfect. No surging, no stalling when using the power steering at low engine RPM, no bucking even in 4th at 1500 RPM. I shift at 6500 RPM without any issues of durability. I just took a roadtrip and got 25mpg hwy. I drive 500+ miles every single week in the car. It runs very, very strong. I'm not reccomending anything I don't have myself.

[91CoupeMike]

Whats you guys Rwhp estimate?

[FoxBodyNick]

I would def look for some 1-3/4 Longtubes, and a 3" exhaust.

lol my point exactly. He has 1 5/8 LT which will be perfectly fine.

[91CoupeMike]

What about the exhaust? With that great intake tract I would def look for some 1-3/4 Longtubes, and a 3" exhaust. You really can't go wrong with a Systemax, or RPM II intake. I would even look for a used TMoss ported RPM. I had him port my RPM II and he did a fantastic job.

1 5/8 is what I already have and I'll stick with that for now. I'll be running spintechs too, 2.5 inch pipe.

[Diabolic]

Current set up.

90mm lightning mass air. Just ordered.
4 inch Anderson power pipe, will be picking it up this week.
70mm accufab race TB ordering today.
24# injectors.

Still looking for an intake manifold.

What signicance does the vacuum tube on the a TB serve? It just vents to the valve cover right?

What about the exhaust? With that great intake tract I would def look for some 1-3/4 Longtubes, and a 3" exhaust. You really can't go wrong with a Systemax, or RPM II intake. I would even look for a used TMoss ported RPM. I had him port my RPM II and he did a fantastic job.

[FoxBodyNick]

Hmmm, well I just figured that adding the additional fuel in the tune and keeping the stock fp was far better than asking an injector meant to flow at 39 PSI to bump up to 70+#'s. I have the knowledge to do it the right way. The way I do it is the right way. I know guys that make 400+hp on 19# injectors and a 12:1 FMU, but that certianly doesn't make it the right way.

The only place we disagree is that you seem to think bigger is better lol