Yet another LSx swap thread
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
I think in the OP's case, if he is wanting to make some serious HP at the tires, the LT4 and LT1 heads can only go so far. Now AFR/Brodix (yes they have'm too), and DART are making some really great heads that get us the potential to make allot more power.
I remember Phil Tobins car making 475rwhp with a 401 and big cam, high compression and seriously worked over AFR 220's?
Now we have heads with a proven track record, thrown into our mold allowing us to get more competitive with the LSx crowd. IMHO
I remember Phil Tobins car making 475rwhp with a 401 and big cam, high compression and seriously worked over AFR 220's?
Now we have heads with a proven track record, thrown into our mold allowing us to get more competitive with the LSx crowd. IMHO
I have a set of both in front of me and there is just no comparing the two regardless of any peeak # which we all know doesnt say much about a head as a whole.
However for the money maybe his bang/buck may be the Darts in this case.
Id love to get my hands on a set of those and see what can be done with them out of curiosity, I just dont own an LT1.
Le Mans Master
Joined: Aug 2002
Posts: 6,080
Likes: 3
From: Clearwater FL
St. Jude Donor '06
I read through your website and the cars progression. Nice read. DEFINATELY go with a road race pan and acusump whatever path you take. I think you should stick with an LT setup for overall ease and $. If you want LS, get a C5.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
A bit of an update for this thread, even though it's not LSx swap related:
Here are some pics of my LT4 heads and intake picked up from Lloyd today. LE2 port job with 2.02/1.60 valves.
http://www.mowhineracing.com/ch22.html
Flow numbers:
Lift Intake Exhaust
.200 145 110
.300 201 143
.400 246 175
.500 284 191
.600 296 203
.700 299 207
My cam is right around .600, so it should work pretty well with these heads.
Here are some pics of my LT4 heads and intake picked up from Lloyd today. LE2 port job with 2.02/1.60 valves.
http://www.mowhineracing.com/ch22.html
Flow numbers:
Lift Intake Exhaust
.200 145 110
.300 201 143
.400 246 175
.500 284 191
.600 296 203
.700 299 207
My cam is right around .600, so it should work pretty well with these heads.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
A bit of an update for this thread, even though it's not LSx swap related:
Here are some pics of my LT4 heads and intake picked up from Lloyd today. LE2 port job with 2.02/1.60 valves.
http://www.mowhineracing.com/ch22.html
Flow numbers:
Lift Intake Exhaust
.200 145 110
.300 201 143
.400 246 175
.500 284 191
.600 296 203
.700 299 207
My cam is right around .600, so it should work pretty well with these heads.
Here are some pics of my LT4 heads and intake picked up from Lloyd today. LE2 port job with 2.02/1.60 valves.
http://www.mowhineracing.com/ch22.html
Flow numbers:
Lift Intake Exhaust
.200 145 110
.300 201 143
.400 246 175
.500 284 191
.600 296 203
.700 299 207
My cam is right around .600, so it should work pretty well with these heads.
Intake #'s are good. Not too impressed with the exhaust #'s. What did this cost? That's the question.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
I have noticed that the exhaust numbers are a bit down compared to some, but I'm not sure why.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
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Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
I guess it is a custom. He spec'ed it out, so I'm not sure if it his started LE3 or what. I think it is a bit bigger than a regular LE3 cam.
Race Director
Joined: May 2003
Posts: 10,749
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Goodluck on the combo!!
Last edited by 88BlackZ-51; Mar 3, 2008 at 06:48 PM.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
While the Eliminators might certainly be better, I was afraid of spending all my money on them and they turn out like AFR's old LTx head, which had problems with core shift and oil leakage through bolt holes.
**I tried to do a search on here, LS1Tech, and CamaroZ28, and everything I found on the Eliminators was "they SHOULD be great, and they SHOULD make great power, and they SHOULDN'T have the problems of AFR's old LTx head."
Race Director
Joined: May 2003
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Yeah, but they are pricey, and I haven't seen many posts of people who have actually used some and posted up flow/dyno results**. Also, I definitely couldn't afford to get a set of AFR's ported, so it was either out of the box unproven Eliminators or proven results with LE. This motor won't ever see boost or nitrous, so the aftermarket casting isn't that big of a deal to me.
While the Eliminators might certainly be better, I was afraid of spending all my money on them and they turn out like AFR's old LTx head, which had problems with core shift and oil leakage through bolt holes.
**I tried to do a search on here, LS1Tech, and CamaroZ28, and everything I found on the Eliminators was "they SHOULD be great, and they SHOULD make great power, and they SHOULDN'T have the problems of AFR's old LTx head."
While the Eliminators might certainly be better, I was afraid of spending all my money on them and they turn out like AFR's old LTx head, which had problems with core shift and oil leakage through bolt holes.
**I tried to do a search on here, LS1Tech, and CamaroZ28, and everything I found on the Eliminators was "they SHOULD be great, and they SHOULD make great power, and they SHOULDN'T have the problems of AFR's old LTx head."
I hear yah! There will be some motors on this forum with AFR eliminator results this summer, so stay tuned. One motor will even be a 421 with a small set of 195's.
Goodluck with the 383, I am sure it will be well over 400rwhp. Where do you figure the torque will be?For the price I paid for my AFR's, I couldnt lose.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
I hear yah! There will be some motors on this forum with AFR eliminator results this summer, so stay tuned. One motor will even be a 421 with a small set of 195's. Goodluck with the 383, I am sure it will be well over 400rwhp. Where do you figure the torque will be?
For the price I paid for my AFR's, I couldnt lose.
Goodluck with the 383, I am sure it will be well over 400rwhp. Where do you figure the torque will be?For the price I paid for my AFR's, I couldnt lose.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
