Engine Upgrades and Fuel System Q

[Peter]

My car blew a HG a few weeks ago after having a couple other annoying problems involving bent push rods and broken rocker nuts.

So I figure its time to pull the motor and have a good look at it just for re-sale value.

I am probably going to have a 331 or 347 short block built and I would like to re-use my eddelbrock rpm 1.9/1.6 valves, but I was wondering how much of a hinderance they might be.

I plan on rebuilding and re-using my V1 s-trim and running either a 8" lower and the stock 3.33" upper or just using the 6.87 lower and a 2.75 upper.

Intake I will keep my systemax, lightning maf and all of that setup.

So my main issues are if the heads will be fine with this setup (I think they will be throwing the max amount of CFM the s-trim can flow), what cam to use and then finally what to do about a fuel system.

My current fuel system was an intake 255lph hi flo with stock rails and 42 lbs injectors.

I figure it would be best to sump the tank buy new rails and build my own system rather then using in tank pumps. So I was wondering what a good pump, regulator and rails would be to buy.

Also I was trying to find a how-to about sumping the stock tank and getting the fuel system plumbed and setup.

 

[LAFENATU]

If your using a blower, I 2wouldnt eveb bother doing a 331...no need your using a blower.

You can make 500+ with a 306.

I would do something like a 9.5:1 stock crank, stock rods, with a nice dished forged piston.

Heads are fine, do a custom cam from FTI or camshaft innovations.

What intake are you using?

For fuel I would do 60lb injectors, 255lph hi-press pump and the t-rex.

 

[Peter]

systemax intake

and I already pretty much have that engine setup in there right now and I made 400 but that was through shortie headers, stock TB and typhoon intake. Didn't dyno it again with the new intake, TB and long tubes. I was going to put a smaller pulley on but then the HG went so I've been thinking on what to do now.

I also would like the torque of a 331 or 347 which is why I'm leaning that route.

 

[LAFENATU]

I just think its kind of a waste to do a 331.

Just my opinion though...take it with a grain of salt.

 

[SVTurbo 98]

Are you using a stock block?

 

[LAFENATU]

Are you using a stock block?

Seems like it.

 

[Peter]

currently there is a stock block in there. Also another reason why I want to go with more cubes so I can keep the revs low and still make good power.

 

[LAFENATU]

Modo on here made 560 with a stock 302 shortblock, AFR heads, GT40 intake, and anderson cam.

Shifting at 6000 I think he went 122-124 through the 1/4.

 

[Peter]

holy crap, what blower and whats the rest of the combo?

 

[LAFENATU]

I believe it was..

Pro-M 80mm MAF
70mm TB
GT40 Intake
AFR 165 heads
Anderson B31 cam
1.6 rockers
Shorty headers
Bassani X pipe
Flowmaster catback
Vortech S-Trim Supercharger

 

[NXcoupe]

For a fuel system you can go with a sumped stock tank, twin GSS395 Walbro inline pumps, run a -10 from the sump to a twin -8 Y and then run -8 y to a single -8 to the rails, -6 return and you will have plenty of fuel. I made 600 rwhp with that on E85 which places roughly a 25% larger demand on the fuel system than gasoline. I like that it was very reasonable and the way I mounted it and routed it it looks nice too.

 

[LAFENATU]

For a stock block 306? A little extreme don't you think?

 

[Peter]

I believe it was..

Pro-M 80mm MAF
70mm TB
GT40 Intake
AFR 165 heads
Anderson B31 cam
1.6 rockers
Shorty headers
Bassani X pipe
Flowmaster catback
Vortech S-Trim Supercharger

what did it mph in the 1/4?

560 seems quite high for that combo unless she was running like 15lbs

 

[LAFENATU]

I believe it was..

Pro-M 80mm MAF
70mm TB
GT40 Intake
AFR 165 heads
Anderson B31 cam
1.6 rockers
Shorty headers
Bassani X pipe
Flowmaster catback
Vortech S-Trim Supercharger

what did it mph in the 1/4?

560 seems quite high for that combo unless she was running like 15lbs

I missed "here" and typed her..."he" ran a 2.95 pulley which is one step smaller from the stock 3.33 pulley.

He'll prob chime in here eventually.

 

[Peter]

ah alright then, ya the 2.95 is 2 pulley sizes smaller then stock I believe so that would give about 3-4 more psi then I was getting right before.

I can see the 2 dynos playing a role in the massive hp differences which is why I'd like to know what he trapped at.

 

[Paul]

At 560 rwhp I'd expect trap speeds in the 130s, or very near there.

 

[Peter]

that and running 10's

 

[LAFENATU]

That might have been the original tune. He might of been using the 3.33 pulley when he was trapping those speeds. He changed his sh1t a few times. I know that he made 560 right before he built his R Block.

Still has that stock block too lol. Never fell apart after years of beating the fvck out of it.

 

[Peter]

regardless if it was the 2.95 or 3.33, 560 is a lot of power to be making on that combo which is why I'm wondering what his trap speed was.

Dyno vs dyno can see a difference of over 100hp, but trap speed gives a better picture as to the power being produced.

 

[NXcoupe]

For a stock block 306? A little extreme don't you think?

Well, it gives room for growth and is pretty reasonable compared to an engine replacement. I was just giving an option like everyone else in this thread. He could run an inline pump to suppliment his intank unit, but he is approaching the power level where that type of system is getting pushed to it's upper limits. He'll be the one to decide what works and doesn't. Oh, and mine is a stock block too, just better internals. A dart block is in its near future tho. I just wanted to see how far I could go and decided that 600 rwhp was enough!