[pannelcrazy]

how much horsepower do you guess ??

468 gm(454 bored)
holley blue fuel pump
4000lbs truck
long tube headers 1 7/8
dual exhast /cross over
stock flat top pistons 9.5.1 comp
mech cam 255/263 lift .555/.551
hurrican single plane intake manifold
patorait heads alum -1.88 2.19 320 cc
flat tappet
new rockers/rods/etc
super street carb 830cfm
posi 373 rear
alum rad /trans cooler/oil cooler/elect fan/
power glide trans

any guesses out there really appricate

 

[ericnova72]

Really need to know more specifics on the cam #'s and cylinder head flow #'s. I can tell you one thing, unless you had the Patriot heads heavily milled and the block zero decked, there is no way you are anywhere close to 9.5-1 compression with a flat top piston. More like 8.25-1. Do you know the actual chamber volume of the heads??

Carb is small for an engine of this size with those heads.

Give us some more info.

 

[pannelcrazy]

the heads where milled .5000
cam 2500-6400
110 but degreed to 108 /dur 255-263 lift .555 .551
stall 3580
manifold 2000-7500
i know the guy i buy it from
started from the block up rebuld i know him pretty well he said
it had 9.1 comp
not sure on the flow on the heads i just know 2.19 -1.88/ 320cc
my mistake 830cfm super street /double pumper
street / strip truck

 

[pannelcrazy]

anybody else?

 

[techinspector1]

Please post the "90% of the time" usage of the truck, along with the cylinder head chamber volume, cam mfg and part number. Looks like a mis-match to me, particularly with the single plane intake if this is a street truck. Depending on chamber volume, waaayyyyy too much cam or waaaayyyy too little static compression ratio, depending on how you look at it. Bottom end will be waaaayyyy soggy. Post up all the details and let us help you.

 

[DoubleVision]

Since it weights 4000 pounds the PG is not going to help matters any, especially with 3.73 gears. Most of the time when PG`s are used the stall converter is around 4000 and the rear gear is 4.56 or lower. a TH400 would work far better than the PG would in a vehicle that heavy.

 

[American Muscle]

Come on down your the next contestant on "Guess that Horsepower"