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Topic Review (Newest First)
03-17-2014 12:54 PM
BuzzLOL . LOL! Hope not, hope he got a strong running engine together...
03-17-2014 11:23 AM
techinspector1
Quote:
Originally Posted by BuzzLOL View Post
. How's this project coming along now?
My best guess would be that the young man got his *** handed to him on a plate and he doesn't want to talk about it.
03-17-2014 09:30 AM
BuzzLOL . How's this project coming along now?
01-21-2013 07:18 AM
BuzzLOL .. Yes, the more powerful the longblock, the more restrictive the 2bbl. is going to seem to be...
01-18-2013 07:33 PM
cobalt327
Quote:
Originally Posted by Jkingof956 View Post
still need to work on heads still not finished with them once done i will start swapping
Use the Camquest program, find a Comp cam as similar as you can to the Summit cam, and compare the 2-bbl to a 4-bbl. You might be surprised. Or not.

Cam Quest download

Estimated difference in HP between a 2 bbl (350 cfm) and a 600 cfm 4 bbl:

NOTE:
All 2bbl peaks are: hp @ 4000 rpm/tq @ 2000 rpm regardless of cam (of these three).
All hp peaks are at 4000 rpm, regardless of cam or 2bbl or 4bbl carb.
With 4bbl, tq peak is 500 rpm higher w/each cam change.

12-300-4 - HIGH Energy
240H cam w/2bbl: 222 hp @ 4000 rpm/363 tq @ 2000 rpm
240H cam w/4bbl: +26 hp/+9 tq @ 2500 rpm; Avg. power +13 tq/+15 hp

12-305-2 - PURE Energy
246PE cam w/2bbl: 225 hp/356 tq
246PE cam w/4bbl:+30 hp/+14 tq @ 3000 rpm; Avg. power +13 hp/+17 tq

12-207-2 - DUAL Energy
255DEH cam w/2bbl: 231/348
255DEH cam w/4bbl:+30 hp/+21 tq @ 3500 rpm; Avg. power +8 hp/+10 tq
01-17-2013 07:12 PM
cadillacdave1 A stock 2 barrel intake will not bolt up to a vortec cylinder head
01-17-2013 05:30 PM
Jkingof956
Quote:
Originally Posted by BuzzLOL View Post
.. Did you get any further on this?
still need to work on heads still not finished with them once done i will start swapping
01-11-2013 07:33 PM
BuzzLOL .. Did you get any further on this?
12-18-2012 02:42 PM
Jkingof956 i just installed a muffler, i will be looking for a posi unit, and going with 700r4 fully build, another reason why so cheap build is because i already have most of the upgrades some were free and ready to install
12-17-2012 09:06 PM
Jkingof956
Quote:
Originally Posted by BuzzLOL View Post
.. Those cars were known for terrible 9-11 MPG and sluggish performance with dished pistons and big 76cc chamber heads... nominal 8.5:1, but actually ~7.6:1 compression ratio. I'd definitely go stock type 4-eyebrow flat top pistons or even 2-eyebrow hypereutectic flat or minidome pistons such as KBs if they fit your budget to get power up throughout the RPM range and cruising MPG up near 17-20 MPG. That cam needs at least 9.5 and preferably 10.5-11.0 compression ratio to run STRONG, which is what you must have to win your race. Power should be 350-400 HP with that cam and Vortec heads depending on other final components used. Torque peak around 4000 RPMs, HP peak around 5500-5700 RPMs, shift at 6,000+ RPMs when racing. The factory RPM range suggested for that 214/224 cam is conservatively much lower because they don't know if you're putting it into a slug stock 7.6:1 engine, which most prolly are, yielding disappointing results. Borrow some short 275-50R-15 (or shorter) drag radials for the track. A 2-bbl. carb. would run fine but start noticably falling on its face at a low 3500 RPMs. Put a properly tuned vacuum secondary 750CFM carb. on it. 600 CFM carb.s usually come default tuned for 305" and slug 350" engines. You'll prolly need the 3000 stall converter to win your race.
tell me about it, very low mpg and very sluggish performance only good thing it has is a really nice takeoff off the line, talking bout pistons i do have some but are 40 over flat top pistons 4 eyebrow but am willing to work with stock pistons with vortec 64cc and a thin gasket for more compression ratio
12-17-2012 09:00 PM
Jkingof956
Quote:
Originally Posted by gearheadslife View Post
good luck the mustangs almost 900 lb lighter..

my dads old olds 77 cutlass s was 4178 lb with power windows/locks tilt and buckets console..
they took alot of metal out in 78. as my SS loaded is 3416
yeah i know mustang is lighter but the good part is his crappy times for the mods it has, i mean running a constant high 14s i can easily beat him with my crappy 13.8 letting off before the quarter that my stock ls1 with some bugs ran
12-17-2012 08:55 PM
Jkingof956
Quote:
Originally Posted by BigEd36 View Post
Jkingof956, with the Summit K1103 cam and Vortec heads I believe you should be in the area of your 350 HP goal. The GMPP CT 350 (350 CI 350 HP) crate circle track engine uses a stock 350 shortblock with vortec heads and the #24502476 cam (.435"/.460" lift, 212*/222* @ .050", 112* LSA). Your Summit K1103 has just slightly more lift and duration (.442"/.465", 214*/224* at .050", 112* LSA).
oh ok i really thought it was going to make close to 300hp cause of the small summit cam but this is good to know that am headed the right direction
12-17-2012 01:32 AM
BuzzLOL .. Those cars were known for terrible 9-11 MPG and sluggish performance with dished pistons and big 76cc chamber heads... nominal 8.5:1, but actually ~7.6:1 compression ratio. I'd definitely go stock type 4-eyebrow flat top pistons or even 2-eyebrow hypereutectic flat or minidome pistons such as KBs if they fit your budget to get power up throughout the RPM range and cruising MPG up near 17-20 MPG. That cam needs at least 9.5 and preferably 10.5-11.0 compression ratio to run STRONG, which is what you must have to win your race. Power should be 350-400 HP with that cam and Vortec heads depending on other final components used. Torque peak around 4000 RPMs, HP peak around 5500-5700 RPMs, shift at 6,000+ RPMs when racing. The factory RPM range suggested for that 214/224 cam is conservatively much lower because they don't know if you're putting it into a slug stock 7.6:1 engine, which most prolly are, yielding disappointing results. Borrow some short 275-50R-15 (or shorter) drag radials for the track. A 2-bbl. carb. would run fine but start noticably falling on its face at a low 3500 RPMs. Put a properly tuned vacuum secondary 750CFM carb. on it. 600 CFM carb.s usually come default tuned for 305" and slug 350" engines. You'll prolly need the 3000 stall converter to win your race.
12-17-2012 12:55 AM
gearheadslife good luck the mustangs almost 900 lb lighter..

my dads old olds 77 cutlass s was 4178 lb with power windows/locks tilt and buckets console..
they took alot of metal out in 78. as my SS loaded is 3416
12-16-2012 09:46 PM
BigEd36 Jkingof956, with the Summit K1103 cam and Vortec heads I believe you should be in the area of your 350 HP goal. The GMPP CT 350 (350 CI 350 HP) crate circle track engine uses a stock 350 shortblock with vortec heads and the #24502476 cam (.435"/.460" lift, 212*/222* @ .050", 112* LSA). Your Summit K1103 has just slightly more lift and duration (.442"/.465", 214*/224* at .050", 112* LSA).
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