HP Estimate
09-03-2016, 02:57 PM
#1
Banned
Thread Starter
Join Date: Jan 2008
Location: Europe->Poland->Warsaw
Posts: 547
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Pontiac Firebird
Engine: 305 LT1 intake&heads
Transmission: TH700r4
Axle/Gears: 3.73 10bolt GM
HP Estimate
What numbeers should i expect? Dyno within a month. Here is engine spec.
305 with 030 overbore
LT1 intake manifold fully ported
Stock LT1 heads 2.0/1.55 valves, milled up to valve seats
Long headers
Flat tapped cam 235/240 .490/.490 lsa 112 advanced 2 deg
Pumpgas
WOT@13.0:1 AFR
2x51 TB
Best regards
305 with 030 overbore
LT1 intake manifold fully ported
Stock LT1 heads 2.0/1.55 valves, milled up to valve seats
Long headers
Flat tapped cam 235/240 .490/.490 lsa 112 advanced 2 deg
Pumpgas
WOT@13.0:1 AFR
2x51 TB
Best regards
09-06-2016, 12:51 PM
#2
Supreme Member
Re: HP Estimate
1.1 - 1.2 HP/CI at the crank provided your compression ratio matches the cam.
Just a guess....
Just a guess....
09-06-2016, 03:12 PM
#3
Supreme Member
Re: HP Estimate
i didnt think a 305 bore would accept that size valve?
" milled up to valve seats" better check valve to piston clearance. sounds like a high compression build. i'm curious to see how much power it makes.
" milled up to valve seats" better check valve to piston clearance. sounds like a high compression build. i'm curious to see how much power it makes.
09-06-2016, 03:15 PM
#4
Banned
Thread Starter
Join Date: Jan 2008
Location: Europe->Poland->Warsaw
Posts: 547
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Pontiac Firebird
Engine: 305 LT1 intake&heads
Transmission: TH700r4
Axle/Gears: 3.73 10bolt GM
Re: HP Estimate
305 wont but with 030 over will, but valve lift is limited to 500
That 1.1 1.2 per ci is what i look for
best regards
That 1.1 1.2 per ci is what i look for
best regards
09-06-2016, 03:28 PM
#5
Supreme Member
Re: HP Estimate
It'll take some RPMs to get there. I would think that cam in a 305 would peak past 6000. Possibly 6500 provided the heads can support it. I don't have any direct experience with the LT1 head but if memory serves, the L31 Vortec is based off of the LT1 intake port. That counts for something.
Thread
Thread Starter
Forum
Replies
Last Post