please estimate chp gain from new heads
Thread Starter
Instructor
Joined: Sep 2006
Posts: 138
Likes: 0
From: toledo ohio
please estimate chp gain from new heads
going from
stock 113 unported heads 58cc 190cfm
to
new afr 180 street eliminator heads angle milled to 58c --260cfm
about 65-70 cfm increase
motor is 350 w/
1204 miniram -- 265cfm
lunati 60103 cam 227/233@.05 110lsa
lift w/1.65 rockers= .538/.554
current combo w/113s dynoed at 273rwhp/308rwtq on mustang dyno
tune was very rich a/f=11
current est hp = 364, est tq = 411
thanks in advance
matt
stock 113 unported heads 58cc 190cfm
to
new afr 180 street eliminator heads angle milled to 58c --260cfm
about 65-70 cfm increase
motor is 350 w/
1204 miniram -- 265cfm
lunati 60103 cam 227/233@.05 110lsa
lift w/1.65 rockers= .538/.554
current combo w/113s dynoed at 273rwhp/308rwtq on mustang dyno
tune was very rich a/f=11
current est hp = 364, est tq = 411
thanks in advance
matt
Drifting
Joined: Aug 2000
Posts: 1,601
Likes: 52
From: Jefferson City MO
Matt, I'm not trying to hijack this tread, but running that rich, do your headers glow a little at night? My car seems to be running that rich and have noticed the LT headers glowing.
Now for your question, I don't know the difference, but going from 190 to 260 can only bring good results!
Now for your question, I don't know the difference, but going from 190 to 260 can only bring good results!
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I've seen data where worked #113s gave 30chp gain; those AFRs should net at least this much, assuming the intake & exhaust can handle it.
On the plus side that 11:1 A/F should move toward the desirable 12:1 range.
If you have an A4, assume 17% DT loss; so 273rwhp->330chp. To verify, take it to the strip and use trap speed & launch weight to calc. chp.
On the plus side that 11:1 A/F should move toward the desirable 12:1 range.
current combo w/113s dynoed at 273rwhp/308rwtq on mustang dyno
tune was very rich a/f=11
current est hp = 364, est tq = 411
tune was very rich a/f=11
current est hp = 364, est tq = 411
Last edited by 65Z01; Jan 27, 2009 at 12:37 AM.
Safety Car
Joined: Feb 1999
Posts: 4,724
Likes: 16
From: Little Elm TX
273 rwhp thru an auto, I have that at right around 340 flywheel ponies..... probably good for around 106-108 mph trap speeds or thereabouts.
But, regardless, provided your motor is hitting on all 8, I think you'll make around 400 flywheel HP and even a little above that with your set-up.....should be good for 112-114 mph traps.
good luck !
But, regardless, provided your motor is hitting on all 8, I think you'll make around 400 flywheel HP and even a little above that with your set-up.....should be good for 112-114 mph traps.
good luck !
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