Suggestions or options to go faster

Curt wrote:

Scott Foxwell wrote:Performance shows ~740-750 observed power.
5.00 would be a little over 1K hp.
Like Chris asked, what's the details of the combination? What rpm are you turning?
750 is pump gas performance from a 532. Not saying that to be negative, just saying there is a lot of room for power gains.

cool40 wrote:I can tell you first hand that 5.40's to 4.90's on motor alone is no easy task and gets expensive . A lot of things go in to going that quick in a door car. You could build a 600+" mill and not go any faster without the car to handle the power and the most important part IMO, the correct converter!  one thing leads to another $$

away wrote:

Scott Foxwell wrote:Performance shows ~740-750 observed power.
5.00 would be a little over 1K hp.
Like Chris asked, what's the details of the combination? What rpm are you turning?
750 is pump gas performance from a 532. Not saying that to be negative, just saying there is a lot of room for power gains.

4.3 stroke 4.440 bore
flat top 13.5:1
off the shelf comp cam 7.26 lift (solid roller torque cam for heavy car) I know improvements can be made here but there is not a lot of piston to valve clearance as it is
TFS street head 290cc version thats been opened to around 305 cc on the intake runner (flows approx 385 cfm)  do not have a flow sheet
straight up cam timing dot to dot
Rons alky terminator system 38 nozzle

Perhaps just a change to the new AFR 300cc heads and intake would shave a few 10ths off your times. They will outflow a TFS Street 290 head in every lift increment that your camshaft will give.
Just a thought.
Launch at 3600 on the chip converter flashes to 5000
shift at 6200 go through lights 6400-6500

BOSS 429 wrote:put a carb on it

cool40 wrote:I can tell you first hand that 5.40's to 4.90's on motor alone is no easy task and gets expensive . A lot of things go in to going that quick in a door car. You could build a 600+" mill and not go any faster without the car to handle the power and the most important part IMO, the correct converter!  one thing leads to another $$

away wrote:

Scott Foxwell wrote:Performance shows ~740-750 observed power.
5.00 would be a little over 1K hp.
Like Chris asked, what's the details of the combination? What rpm are you turning?
750 is pump gas performance from a 532. Not saying that to be negative, just saying there is a lot of room for power gains.

4.3 stroke 4.440 bore
flat top 13.5:1
off the shelf comp cam 7.26 lift (solid roller torque cam for heavy car) I know improvements can be made here but there is not a lot of piston to valve clearance as it is
TFS street head 290cc version thats been opened to around 305 cc on the intake runner (flows approx 385 cfm)  do not have a flow sheet
straight up cam timing dot to dot
Rons alky terminator system 38 nozzle

Launch at 3600 on the chip converter flashes to 5000
shift at 6200 go through lights 6400-6500

away wrote:

cool40 wrote:I can tell you first hand that 5.40's to 4.90's on motor alone is no easy task and gets expensive . A lot of things go in to going that quick in a door car. You could build a 600+" mill and not go any faster without the car to handle the power and the most important part IMO, the correct converter!  one thing leads to another $$

Not worried about the money part or more maintenance etc.  Engineer, Single, no kids I do what I want and bang who i want lol.  I have my own machine shop equipment and am very comfortable cleaning, boring, honing, decking blocks and heads setting up spring heights and pressures and touching up valve jobs etc.  The only thing I leave to the pros on my builds is the head porting bc I just haven't done it a lot or have fancy cnc stuff.  So nonetheless my machine shop expense will be very very small in comparison to the regular joe building and maintaining an engine.

The only racing I have done is bracket race and I also have two bracket cars to race so my thoughts is to turn one into a very fast bracket deal that could possibly double and do some other heads up power adding grudge or whatever comes along type of racing to break up the same ole same ole bracket racing deal.  Obviously the other mustang II can stay a bracket car warrior.

So I guess that leads into another question what can I do with my rides beside bracket race?  

Thanks for any suggestions in advance

away wrote:
Based on experience and your approx 385 cfm flow number there is easily 75HP left in the engine.   If the flow numbers can be had I can give you exact, but I would say the combo has the potential for 850HP.

away wrote:

Scott Foxwell wrote:Performance shows ~740-750 observed power.
5.00 would be a little over 1K hp.
Like Chris asked, what's the details of the combination? What rpm are you turning?
750 is pump gas performance from a 532. Not saying that to be negative, just saying there is a lot of room for power gains.

4.3 stroke 4.440 bore
flat top 13.5:1
off the shelf comp cam 7.26 lift (solid roller torque cam for heavy car) I know improvements can be made here but there is not a lot of piston to valve clearance as it is
TFS street head 290cc version thats been opened to around 305 cc on the intake runner (flows approx 385 cfm)  do not have a flow sheet
straight up cam timing dot to dot
Rons alky terminator system 38 nozzle

Launch at 3600 on the chip converter flashes to 5000
shift at 6200 go through lights 6400-6500

Lem Evans wrote:You've got a lot to get by changing the camshaft.

What valve spring do the heads have?

away wrote:

Lem Evans wrote:You've got a lot to get by changing the camshaft.

What valve spring do the heads have?

I figured this due to everything else growing up and still using the old cam lol.  Can't remember the part number of the springs off hand  but I know they are around 250 on the seat and 650 open at .726-.750 lift I would have to check my log at home to get more accurate than that just going off of memory for now but very close

away wrote:Compression is a little low for alky. What size valves in the heads? How about the rest of the cam specs? It would be well worth your while to get your heads on a flow bench and see what they flow.
The combination sounds like it has more potential. Maybe look at another cam. V/P may or may not be an issue. Lift isn't really a factor. Events have more to do with V/P clearance. I agree with Chris that 850 should be doable IF the heads are up to it.
I typically make between 750 and 800 on pump gas 532 hyd. roller BB Chev's with (assuming) similar head specs but with a 4" stroke and 4.60 bore. That 4.3" stroke is going to pull a little harder on the induction but you're not turning it real hard either. You may be just running out of cylinder head.