My 408 is here (Cam decision)
11-06-2006, 04:41 PM
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My 408 is here (Cam decision) LME delievered on time. They said 3 weeks and the short block was here in 3 weeks. Anyways i have the FMIC, AFR Heads, and everything else to put this baby together.
The setup is a 408 with AFR 225 heads giving a Compression ratio of 8.5:1. The blower for now is a D-1SC until i can sell it to buy an F1-R. With the D-1SC we will need to take the engine up to 7K to max the D-1SC. The pulley combo is 7.25 crank and 3.4 SC. I want a cam that peaks around 6500-6700RPM so shifts will be done at 7000-7100RPM.
So far Im thinking 234/242 .605 .615 115 LSA cam which should put me around 8 degrees of overlap. Any other recommendations?
The setup is a 408 with AFR 225 heads giving a Compression ratio of 8.5:1. The blower for now is a D-1SC until i can sell it to buy an F1-R. With the D-1SC we will need to take the engine up to 7K to max the D-1SC. The pulley combo is 7.25 crank and 3.4 SC. I want a cam that peaks around 6500-6700RPM so shifts will be done at 7000-7100RPM.
So far Im thinking 234/242 .605 .615 115 LSA cam which should put me around 8 degrees of overlap. Any other recommendations?
11-06-2006, 06:41 PM
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Originally Posted by obZidian
its like christmas, isnt it? i remember doing that and what a feeling... Weren't you a vert car?
anyways, good luck!!
anyways, good luck!!
11-06-2006, 06:45 PM
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I was running the FM7 cam in my stock engine. It did great under boost. The spec on the FM7 were 224/230 .587 .593 114LSA. What do u guys think the FM7 will do in a 408 with 225 AFR's running 15-17psi. Im thinking it might peak around 5800RPM or so.
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11-06-2006, 06:54 PM
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Originally Posted by MyWs62FaST4u
is that the ls2 based... or an iron block? looks killer!
Iron... Im planning to run 20lbs+ of boost later on with a F1-R. Thats why I went with the Iron.
Im going to weigh the iron block and stock alum block later on just to see the exact difference in weight between them.
Last edited by LSs1Power; 11-06-2006 at 07:00 PM.
11-06-2006, 07:02 PM
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awesome, i just wanted to run 20 at the max!!! So i saw it fit to use the LS2 based, but if there is no real diff in the two, except the fact that one will hold alot more, and probably last longer- then the iron is the way to go. Do you know if thats the LQ9 block?
11-06-2006, 07:11 PM
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Originally Posted by MyWs62FaST4u
awesome, i just wanted to run 20 at the max!!! So i saw it fit to use the LS2 based, but if there is no real diff in the two, except the fact that one will hold alot more, and probably last longer- then the iron is the way to go. Do you know if thats the LQ9 block?
11-06-2006, 08:06 PM
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Originally Posted by LSs1Power
Iron... Im planning to run 20lbs+ of boost later on with a F1-R. Thats why I went with the Iron.
Im going to weigh the iron block and stock alum block later on just to see the exact difference in weight between them.
Im going to weigh the iron block and stock alum block later on just to see the exact difference in weight between them.
And the answer is right at 80lbs. Well worth it IMO, tho it will run ~10* hotter.
Your cam is similar to mine, only a tad bigger. Sounds good to me, but I'd call Cam Motion just in case. They will try to talk you into more lsa for 20 psi. Won't sound as good, but it will make a tad more power. It's a choice you have to make.
My hp levels off around 5500 right now. But I think that's due to air inlet restrictions & my dinged impeller. My P made power to 6300. And you might want to consider a cogged belt for that much boost. It should take close to 150hp to drive that baby!
Another thing to remember about boost - it makes a TON of tq. So you may find your car is faster shifting lower. Nothing quite like 700+lbs of tq when you shift.....good luck & hold on!
11-06-2006, 08:13 PM
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Originally Posted by WAHUSKER
My hp levels off around 5500 right now. But I think that's due to air inlet restrictions & my dinged impeller. My P made power to 6300. And you might want to consider a cogged belt for that much boost. It should take close to 150hp to drive that baby!
Another thing to remember about boost - it makes a TON of tq. So you may find your car is faster shifting lower. Nothing quite like 700+lbs of tq when you shift.....good luck & hold on!
Another thing to remember about boost - it makes a TON of tq. So you may find your car is faster shifting lower. Nothing quite like 700+lbs of tq when you shift.....good luck & hold on!
11-06-2006, 10:37 PM
#14
PM me if your interested. I had a custom cam made for my built 408/F1C Procharger setup that I am not going to use. It's a pretty big cam as I was setting it up mostly for the track. 236/248 on a 115LSA at .610lift I believe.
Let me know if your interested and I will see if the guy I was buying it from still has it. Basically built for the exact setup your doing! I bet he would give a good deal since I am taking a hit on it for swapping to a TT cam.
Let me know if your interested and I will see if the guy I was buying it from still has it. Basically built for the exact setup your doing! I bet he would give a good deal since I am taking a hit on it for swapping to a TT cam.
11-06-2006, 10:57 PM
#16
talk to LME and cam motion since they made the shortblock.but just some info they made my cam a 244/253 .644 on a 115. everyone says its large but who knows. tuning isnt finished since the clutch gave out on the dyno. and im waiting for my exoskel twin disk
11-06-2006, 11:41 PM
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Originally Posted by SVC707
talk to LME and cam motion since they made the shortblock.but just some info they made my cam a 244/253 .644 on a 115. everyone says its large but who knows. tuning isnt finished since the clutch gave out on the dyno. and im waiting for my exoskel twin disk
11-07-2006, 07:49 AM
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Originally Posted by LSs1Power
Whats your cam specs? I dont think i will make as much TQ as you since im running a M6. I think the SDCE setup will hold up at 18-20psi hopefully. Don't forget a F1-R might only require 3.85 pulley to get me 18-20psi while a D-1SC will need a 3.4 pulley to show me 14-15psi if im lucky.
Yeah, my stall flashes pretty quick with the D. Actually breaks the tires loose on the dyno if they don't roll into the throttle. And I am running the 8 rib 7.75" ATI blancer pulley & a 3.45" blower pulley. It only make 13 psi now but it should hit 15 psi when I get the impeller fixed.
I pushed it to 6500 on the dyno (~60k imp speed) which is where I shift at, but like I said, it quit making power after 5500. I want to make a pass shifting at 6k to see what it runs. It could be faster.
Bob @ EPP suggested I rework the air inlet hat. He picked up 50hp as I recall. So I installed one of the ricer-type mushroom filters & saw no change. Are you going to run alky? It helps a bunch at the levels you're headed towards.
11-08-2006, 01:49 AM
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so there really isnt much of a differnce when we compare an iron block with 10/12 lbs. of boost, to the total weight savings of a LS2? I guess it's worht the 70 lbs. or 80...