F13 cam
04-08-2005, 10:55 AM
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F13 cam I have a 98 Z28, I have ASP underdrive pulley, ls6 intake, 3:73 gears, TCI3500 stall,custom GMMG, AFR205 heads. I was planning to get a F13 cam but i am not sure if i should for a +2 or a +4 for the lsa. Will it be more difficult to tune? Which one would work better? thanks for your help guys
04-08-2005, 11:42 AM
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Originally Posted by vette460
I have a 98 Z28, I have ASP underdrive pulley, ls6 intake, 3:73 gears, TCI3500 stall,custom GMMG, AFR205 heads. I was planning to get a F13 cam but i am not sure if i should for a +2 or a +4 for the lsa. Will it be more difficult to tune? Which one would work better? thanks for your help guys
Futral's standard grind comes w/4* of advance. That's what I have in mine, on a 114LSA. Similar mods to what you have (stock heads), put down 391/357 locked.
04-08-2005, 11:46 AM
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Originally Posted by 99BackNBlackZ28
Futral's standard grind comes w/4* of advance. That's what I have in mine, on a 114LSA. Similar mods to what you have (stock heads), put down 391/357 locked.
I forgot to mention that that +4 or +2 will be on a 112 LSA
04-08-2005, 11:54 AM
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Originally Posted by vette460
I forgot to mention that that +4 or +2 will be on a 112 LSA
04-08-2005, 12:18 PM
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Originally Posted by 99BackNBlackZ28
I dont think going either way is going to make a huge, SOTP difference. If you order it on a +2 I bet you'll have to wait a tad longer to get it, but who knows.
I do have an A4, I ordered the F13 cam 112+2, 3 weeks ago but there was a mix up so they said I could get 112+4 now or wait a few days for the 112+2.
04-08-2005, 12:32 PM
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Originally Posted by vette460
I do have an A4, I ordered the F13 cam 112+2, 3 weeks ago but there was a mix up so they said I could get 112+4 now or wait a few days for the 112+2.
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04-08-2005, 02:01 PM
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Well are the heads milled??, in some instances less advance will increase PTV clearance.
But if your question only about performance, then no, no need to wait and a +4 should work a little better with your 3500 stall.
The reason is that if your powerband comes on sooner, then it ends sooner, keeping your shift points/power range within the stall shift extensions.
Also get the right head gaskets to give you a .035>.038 quench range.
To do that you'll have to measure your piston to deck distance +/- (in or out of hole).
(PTDD - gasket thickness compressed= Quench)
The AFR's have a double quench area vs a single on GM castings, so improving flame travel and speed by getting a nice tight quench is very benifitial.
Try to shoot for as close to 11.0:1 SCR with a .035 quench and that will be worth a few extra ponies.
But if your question only about performance, then no, no need to wait and a +4 should work a little better with your 3500 stall.
The reason is that if your powerband comes on sooner, then it ends sooner, keeping your shift points/power range within the stall shift extensions.
Also get the right head gaskets to give you a .035>.038 quench range.
To do that you'll have to measure your piston to deck distance +/- (in or out of hole).
(PTDD - gasket thickness compressed= Quench)
The AFR's have a double quench area vs a single on GM castings, so improving flame travel and speed by getting a nice tight quench is very benifitial.
Try to shoot for as close to 11.0:1 SCR with a .035 quench and that will be worth a few extra ponies.
Last edited by PREDATOR-Z; 04-08-2005 at 02:07 PM.
04-08-2005, 02:25 PM
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Then get the cometic .045 head gaskets and assuming you have a stock block ~(.007) out of hole that will give you a nice .038 quench.
Personally, I would mill those ~.015'>.020'
That would bump your CR a little and increase your output.
Personally, I would mill those ~.015'>.020'
That would bump your CR a little and increase your output.
04-08-2005, 02:36 PM
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Originally Posted by PREDATOR-Z
Then get the cometic .045 head gaskets and assuming you have a stock block ~(.007) out of hole that will give you a nice .038 quench.
Personally, I would mill those ~.015'>.020'
That would bump your CR a little and increase your output.
Personally, I would mill those ~.015'>.020'
That would bump your CR a little and increase your output.