[SS_Sean]

Guys, with my recent marriage and plans for a child (at 40 years old), I've had to rearrange the plans on the motor, as well. What I would like to do is use my current combo with some head work and a cam swap. That's about all I can afford this time around. I would like to go solid roller. On the heads I'm going to open the intake valve up to 2.25 or 2.30, depending on what works, and do some serious port work. They are uncut, so far. Am looking for 9.80's. Current times in sig.

Motor is:
454 BBC .060 over
GM forged crank
Eagle Rods
SRP pistons/12.4:1 cr
Lunati 259/267, .625/.625, 110 lsa
Vic intake
Prosys 1050 Dom
Edel RPM heads, 2.19/1.88, 315 long runners.

Car:
TH400 w/brake, 5000 stall PTC converter.
9" ford, 4.10 gears
28x10.5 ETs
12 pnt cage cert'd to 8.50's.
2970# w/o driver 3200# w/driver.
Launch is 4600 and shifting at 6500 1-2. Not affraid to run her out to 7000 on a new cam/combo, though.

Was originally planning on a 496, but that just isn't going to happen. We're coming down to the end of the season and I will start buying parts in Oct. I fell into an over-time opporunity so want to get after the parts before the wife spends the money. Any and all suggestions are appreciated!!

 

[M.Maner]

Guys, with my recent marriage and plans for a child (at 40 years old),

Any and all suggestions are appreciated!!

OK you asked for it.
My suggestion would be to have your head examined.
Mike

 

[DragRacer]

Very high quality work at reasonable prices. He is also pretty quick on turn around time.

http://www.speierracingheads.com

 

[SS_Sean]

OK you asked for it.
My suggestion would be to have your head examined.
Mike

LOL! I can't argue this advice.

Thanks for the heads-up on them. I do have a very good guy locally who can do the head work.

How about some cam suggestions?

 

[DragRacer]

Sean,

Need to get the heads done first then decide on the cam.

What do you feel comfortable with in regard to max. HP RPM and shift RPM?

I would look to get compression up when you do the heads. You are in "no mans land" now. Too high for pump, too low to really take advantage of race gas.

Right now based on the MPH, it appears you are making around 540 flywheel HP as installed in the car. This of course is at the conditions you run in. Would be more with correction factor on the dyno. What DA was the 10.49 @ 128? What is your track's actual elevation?

To run 9.80's @ 3200 lbs, you will need about ~670 HP as installed in the car. 130 HP jump is quite a bit, but it can be done.

 

[SS_Sean]

Sean,

Need to get the heads done first then decide on the cam.

What do you feel comfortable with in regard to max. HP RPM and shift RPM?

I would look to get compression up when you do the heads. You are in "no mans land" now. Too high for pump, too low to really take advantage of race gas.

Right now based on the MPH, it appears you are making around 540 flywheel HP as installed in the car. This of course is at the conditions you run in. Would be more with correction factor on the dyno. What DA was the 10.49 @ 128? What is your track's actual elevation?

To run 9.80's @ 3200 lbs, you will need about ~670 HP as installed in the car. 130 HP jump is quite a bit, but it can be done.

The max RPM I would be looking at is 7200rpm's. I would like to get compression up but will probably have to deck the heads a little. I didn't really want to but I know exactly what you're talking about being in no man's land.

The elevation of my track is 1410' and DA's usually range around 4000 in summer and 2000 in fall. That 10.49 was run on a 1600' DA.

So, you're saying get the heads done/flowed and see where I sit for max flow so I can pick max lift, right?

Guys, I know this won't be the best combo in the world, but it's what I've got to deal with. I'm hoping that a couple years out I'll be able to build that big cube motor I've been wanting to do...This is just a bridge to get me through the next couple.

 

[Guest]

Imho, you better can this project and start a "College Fund" instead!

Unless you are making in the multi-$100,000's............... B/c I'm not.

pdq67

Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

 

[DragRacer]

The max RPM I would be looking at is 7200rpm's. I would like to get compression up but will probably have to deck the heads a little. I didn't really want to but I know exactly what you're talking about being in no man's land.

The elevation of my track is 1410' and DA's usually range around 4000 in summer and 2000 in fall. That 10.49 was run on a 1600' DA.

So, you're saying get the heads done/flowed and see where I sit for max flow so I can pick max lift, right?

Guys, I know this won't be the best combo in the world, but it's what I've got to deal with. I'm hoping that a couple years out I'll be able to build that big cube motor I've been wanting to do...This is just a bridge to get me through the next couple.

Sean,

That's right. Get the heads done and then decide on the cam based on cross section, port velocity, and flow.

With a 4.25" based bore, I would stay with a 2.25" valve. Valve lift is also going to be determined on valve size and RPM requirement. With peak power at 7200 RPM, you need to be right around .800" net lift with a 2.25" valve. Intake duration is going to need to be mid-low 26X deg. @ .050. If you do it the old school way, you will end up with more duration and less lift.

In all honesty, with a 454 and a 7200 RPM limit(peak power or shift??), the heads need to stay conservative or you will be hurting yourself. Don't "max effort" port them now, or they are going to be too big or require much more RPM and converter.

Even if you don't have your heads done by Chad Speier, I would call him and chat. He learned from one of the best in the country and has a real good grasp on what needs to be done. He will evaluate them for free.

 

[steelcomp]

I agree that there's really no way of knowing on the cam, without knowing the heads. My guess is 2.25 on the valve, no need for a 2.300. IMO the X sections on those heds may already be big for your combination so be cafreful on the porting...bigger isn't always better. (seldom is). Your 454 @ 7200rpm with a 280* @ .05 cam is only asking for ~300cfm. At 260* you're looking at ~ 325cfm. Compression is your friend, so I'd work on getting as much as you can. When you're ready, contact Chris Straub for your cam.

 

[SS_Sean]

Good info, guys. Thanks. I want 9's on a shoe string. I know I can do it, just need to listen to the guys that have been there done that.