hey fellas if you dont mind someone please tell me as near as you can figure please estimate my (HP)
here are my numbers
Fresh 40 over 350 block 2 bolt main with arp main studs
Bored and honed with torque plate, decked
Brass freeze plugs with clevite cam bearings
Cast crank turned 10/10 with clevite main bearings
Rebuilt rods with arp wavelock bolts and clevite bearings
Speed Pro Hyperutectic flat top pistons with speed pro moly rings
Assembled with all clearances checked

edelbrock 1411 carb $259 10in open element breather
and hei dizzy

xe268h


Camshaft Part # 12-242-2 Designation XE268H-10 Duration @ 0.006": 268° / 280° Duration @ 0.050": 224° / 230° Max Lift w/ 1.5RR: .477" / .480" Lobe Separation: 110° Lobe ID#'s: 5443 / 5203 Intake Centerline: 106°

upgraded Vortec Head Kit, Edelbrock Performer RPM

SD8060ARPM (intake 7116 and 062 cylinder heads)with 1.94/1.50 valves and Both heads have 64 cc chambers, 170 cc Intake runners.
hooker shortie headers no CAT ,d901 y pipe, 2.5in pipe from ypipe all the way back Vforce muffler dual chrome 2.5in tips

if any other info is needed just let me know!

 

Very similar build to one of my 1st Vortec engines. It also parallels several magazine builds where they tout 400 hp at the crankshaft. Keep in mind that's with no accessories (alternator, power steering) an electric water pump and headers that are designed for the dyno. Your headers and accompanying y-pipe and exhaust will limit some of your potential.
Realistically, you should be able to make a little more than 1 hp/cubic inch out of those heads and cam provided your compression is up to par with your cam timing.

 

I was going to say 350 hp, but then I realized you're trying to push it through a single 2.5" exhaust past the Y. 325 at most (crank hp).
What's your CR?
deck clearance?
head gasket thickness?

 

roughly a bit over 300hp at crank tranlates to the rear tire about 225hp to the ground or am i being a bit too optimistic?

 

I don't mean to hijack, but what size exhaust should he have? 3" i'm guessing? Is the 2.5 y pipe choking it down too? Budget builder is this engine in the car yet? I'm curious too see the hood clearance (if any) with the RPM intake. I'm doing almost an exact build too. Just .30 over with a hotcam and 1.6RR's

 

As u can see my hood has a little bit of a scoop on it so I don't have any problems with clearance with the 10in breather

 

nice. did you use a drop base air cleaner or no?

 

no, i thought i was going to have to but it has pretty good clearance. the hood was picked up for close to nothing I dont know who made it for the guy but for 150 i jumped on it.

 

As an example, my Vortec headed 350 with an Edelbrock short header and y-pipe into a 3" cat back system went mid 13.7's at about 100 mph.
Depending on how you reverse calculate those numbers that's something like 290 hp to the rear wheels or 350 flywheel horsepower.
The 2.5" exhaust ( and possibly are more restrictive y-pipe as some of them are terrible) would probably yield a smaller hp number.
A move to 1.6 ratio rockers yielded about 2/10's and a full long tube header into a 2.5" x 3" custom y-pipe resulted in another 2/10s. (Remember this wasn't same day, same track results but you get the idea.)

 

This thread should give you an idea of what the hood clearence is like.

https://www.thirdgen.org/forums/carb...b-sealing.html

 

a little less than 20% loss from flywheel to wheels ok thanx! oh and yeah the only thing i dont like is the cowl opening is trully open and it directly feeds my breather and i do mean directly in front of it. when I take it to the body guy i was going to ask them to put a bullet hole or honeycomb type material in front to protect the breather. What do you guys think?