347ci ls1 with 5.3 heads and eps custom cam
05-04-2011, 12:36 PM
#1
347ci ls1 with 5.3 heads and eps custom cam I will be dynoing the Nova Next wednesday.
347 ci , Mahle -4cc pistons, Scat 6.125 I beam rods,5.3 heads milled to 54cc,11.64/1 compression. cam is a eps 238/250 .603/.596 110lsa +4 deg advance. Intake is a 6.0 truck intake with a ported 78 mm tb.
Th350 trans with a 8" TCI converter around 5000 stall. Custom built 1.75 headers with bullets off the back the headers. Rearend is a narrowed 12 bolt with 4.11 gears and 31x13x 15 m/t slicks
this same setup with a futral grind 239/243 .612/.612 112lsa+2 (not designed for my engine, it was designed for a 383 stroker) the car dynoed 397rwhp through the slicks after going to 15 psi in tires.(made 352 at 10 psi
) WIth that cam and the rings not seated the car ran a best of 10.24@128 with a 1.42 60 ft. THe cam did not build good cyl pressure with a stock stroke mixed with my rings not seated The car still ran strong at 2570 lb race weight.
any predictions for the new setup with a fresh set of rings that did seat?
Lets see who gets closest, Ill dyno this time at 15 psi in slicks to see compared to last time.
link to video below
http://youtu.be/s0PGznEH88k
347 ci , Mahle -4cc pistons, Scat 6.125 I beam rods,5.3 heads milled to 54cc,11.64/1 compression. cam is a eps 238/250 .603/.596 110lsa +4 deg advance. Intake is a 6.0 truck intake with a ported 78 mm tb.
Th350 trans with a 8" TCI converter around 5000 stall. Custom built 1.75 headers with bullets off the back the headers. Rearend is a narrowed 12 bolt with 4.11 gears and 31x13x 15 m/t slicks
this same setup with a futral grind 239/243 .612/.612 112lsa+2 (not designed for my engine, it was designed for a 383 stroker) the car dynoed 397rwhp through the slicks after going to 15 psi in tires.(made 352 at 10 psi
) WIth that cam and the rings not seated the car ran a best of 10.24@128 with a 1.42 60 ft. THe cam did not build good cyl pressure with a stock stroke mixed with my rings not seated The car still ran strong at 2570 lb race weight.any predictions for the new setup with a fresh set of rings that did seat?
Lets see who gets closest, Ill dyno this time at 15 psi in slicks to see compared to last time.
link to video below
http://youtu.be/s0PGznEH88k
Last edited by AINT SKEERED; 05-06-2011 at 05:30 PM.
05-04-2011, 10:14 PM
#7
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Holly steam roller batman haha your car has a bit of a over tire problem. No wonder your dyno numbers are low. them meats dont like chassis dyno's at all. but i want to see your numbers and track times
Rob
Rob
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05-05-2011, 07:02 AM
#9
05-05-2011, 12:17 PM
#10
Im not to concerned with the dyno numbers. The 8" converter and the slicks both kill that. I have seen 45 hp just from putting 5 more lbs of air in the slicks. However at the track the car makes more mph at 12 psi then it does at 15 . That is something i cant figure out.
05-05-2011, 02:34 PM
#11
I always start out at the track running 14-15 psi. I have gone from 127 consistant to 128 just by letting air out the slicks. Never made sense to me because i have always believed running more air was better. Maybe its just with these big tires.
I am looking to change to a drag radial soon, just dropping tires size will require a 1 " spacer to make it look right and to run that much of a spacer I am going to put the 5/8 stud . For now Im going to run it like it is and do apples to apples testing.
I am looking to change to a drag radial soon, just dropping tires size will require a 1 " spacer to make it look right and to run that much of a spacer I am going to put the 5/8 stud . For now Im going to run it like it is and do apples to apples testing.
05-05-2011, 03:59 PM
#13
YES , They are pretty deep. We checked valve drop at top dead center before i even ordered the cam while the old cam was still in the engine. It had a half inch of drop. I felt confident in ordering after seeing that.
I checked it after rebuilding the engine when i put the cam in and it had close to .100 clearence.
I checked it after rebuilding the engine when i put the cam in and it had close to .100 clearence.
05-05-2011, 05:14 PM
#15
This is a tub and narrowed rear, it looked retarded with 325/50's. They were to short and they needed to be spaced out due to my 15x12 inch wheels and 5" back space. I need a rim with 4" back space.
Thats why im going to put 5/8 studs and a 1 inch spacer. The 30 inch tall tires are needed because the way my wheel wells are modded it looks like crap with the short tire. I am running 4.10 gears right now, I will be doing the tire swap first then determine if it wants 4.30 or 4.56 gears.
Thats why im going to put 5/8 studs and a 1 inch spacer. The 30 inch tall tires are needed because the way my wheel wells are modded it looks like crap with the short tire. I am running 4.10 gears right now, I will be doing the tire swap first then determine if it wants 4.30 or 4.56 gears.
Last edited by AINT SKEERED; 05-06-2011 at 06:08 PM.
05-10-2011, 08:08 PM
#17
SO not predictions? anyone think this cam will do better for my setup or worse, go ahead and say what you think. Will be dyno tuning it tomorrow and if the local tracks dont flood by saturday from the Mississippi river I will run Saturday night.
05-10-2011, 08:47 PM
#18
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Hub City is open this Friday Night.
05-11-2011, 05:55 AM
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what i dont understand is why you need more horsepower?!?!?! you run 10.20's lol on high 300's id just take the dyno sheet to the track and slap people in the face with that when you whip there 700whp cars ***...