Looking for help on cam selection
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
Looking for help on cam selection So I change my heads on my 370 to the tfs 235 58 cc, 92/102 intake port matched, 1 7/8 headers and put a 239/258 112 with center line at 107 , took it to the track and it fell short of what was expected only pick up 1 mile per hour and close to the same et as before. 118 @ 11.88 with the new set up, the old set up was same short block 1 3/4 headers, 92/92 , and prc 5.3 stage 2.5, ran 117 @ 11.80 , so I thinking the cam is the suspect.
Old cam was 236/250 115 +4
Any help would be appreciated
Old cam was 236/250 115 +4
Any help would be appreciated
Last edited by M1SERY; May 11, 2016 at 10:41 AM. Reason: More information
What was the previous cam that you had in there?
Hard to imagine all those mods only picking up 1mph, something else must be up with the new setup. That thing should run much better than that.
Hard to imagine all those mods only picking up 1mph, something else must be up with the new setup. That thing should run much better than that.
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
TOO MUCH EXHAUST SPLIT! & Narrow LSA with TFS CATHEDRAL HEADS, Even with 200 shot. 4-6* exhaust split with good flowing
Exhaust NA, 200 shot +8-12* would be PLENTY.
235/243 mostly street, 239/251 mostly strip with
TFS 235s on a 370" LSA (112-114) ADV +3-4)
with a 200 shot.
No expert just my .02
Exhaust NA, 200 shot +8-12* would be PLENTY.
235/243 mostly street, 239/251 mostly strip with
TFS 235s on a 370" LSA (112-114) ADV +3-4)
with a 200 shot.
No expert just my .02
Last edited by NAVYBLUE210; May 11, 2016 at 03:24 PM.
Thread Starter
Launching!
Joined: Oct 2012
Posts: 219
Likes: 0
From: near Beech Bend race way
TOO MUCH EXHAUST SPLIT! & Narrow LSA with TFS CATHEDRAL HEADS, Even with 200 shot. 4-6* exhaust split with good flowing
Exhaust NA, 200 shot +8-12* would be PLENTY.
235/243 mostly street, 239/251 mostly strip with
TFS 235s on a 370" LSA (112-114) ADV +3-4)
with a 200 shot.
No expert just my .02
Exhaust NA, 200 shot +8-12* would be PLENTY.
235/243 mostly street, 239/251 mostly strip with
TFS 235s on a 370" LSA (112-114) ADV +3-4)
with a 200 shot.
No expert just my .02
Texas speed has a self cam what u think, trying to get my head around this stuff , so far I'm doing a poor job, do u think this cam will make any torque,
who would cut that cam u mentioned
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TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
I would have Kip @ Cam Motion, or Brian Tooley @ BTR
(who was at TFS when they designed the 235s) spec you
A cam. I am not an engine builder or mechanic. I have
A custom build going for my C5 Corvette. Been reading and
Studying about Engines along time 35+ years the LS for
The last 9, been to a couple Tony Mamo Dyno tests for
His builds, reading LS1Tech @ CF for 9 years also.
That 244/248 cam is Wrong! For a 370" better for a 418"
4" stroke would have very poor low end torque in your
Engine. Based on the mods in you're sig I'm guessing
This is a 90%+ Strip Car?
Again my .02 is 370" with TFS235s 235*-239* Intake duration
Normally Aspirated add 4-6* to the exhaust, with a 200 shot
Of N2O I would add 4-6* on top of that.
Lobe separation and advance would be better specced by the
Aforementioned cam experts.
Again that TSP Cam is all wrong for your combo IMHO.
(who was at TFS when they designed the 235s) spec you
A cam. I am not an engine builder or mechanic. I have
A custom build going for my C5 Corvette. Been reading and
Studying about Engines along time 35+ years the LS for
The last 9, been to a couple Tony Mamo Dyno tests for
His builds, reading LS1Tech @ CF for 9 years also.
That 244/248 cam is Wrong! For a 370" better for a 418"
4" stroke would have very poor low end torque in your
Engine. Based on the mods in you're sig I'm guessing
This is a 90%+ Strip Car?
Again my .02 is 370" with TFS235s 235*-239* Intake duration
Normally Aspirated add 4-6* to the exhaust, with a 200 shot
Of N2O I would add 4-6* on top of that.
Lobe separation and advance would be better specced by the
Aforementioned cam experts.
Again that TSP Cam is all wrong for your combo IMHO.
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TECH Fanatic
Joined: Sep 2003
Posts: 1,058
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So I change my heads on my 370 to the tfs 235 58 cc, 92/102 intake port matched, 1 7/8 headers and put a 239/258 112 with center line at 107 , took it to the track and it fell short of what was expected only pick up 1 mile per hour and close to the same et as before. 118 @ 11.88 with the new set up, the old set up was same short block 1 3/4 headers, 92/92 , and prc 5.3 stage 2.5, ran 117 @ 11.80 , so I thinking the cam is the suspect.
Old cam was 236/250 115 +4
Any help would be appreciated
Old cam was 236/250 115 +4
Any help would be appreciated
Look at something around 239/247-114+3 or ask Martin. He has some good cam ideas for those heads.
