**Lil 408 update**
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From: Orange county n.y.
I'm happy with the #'s Of coarse i would of liked to see 550-560 hp but i told myself going into this that if it made 500+ i would be happy! I also think some break in time will help as well.
As far as retarding my cam what type of gains do you think i would see??
I think that after it breaks in and i retard the cam 2 or so degrees i could possible hit 525 rwhp. Whatca think
As far as retarding my cam what type of gains do you think i would see??
I think that after it breaks in and i retard the cam 2 or so degrees i could possible hit 525 rwhp. Whatca think
Originally Posted by kumar75150
really?
the only car i remember that made huge numbers it that one 402 mikey at rapid motorsports did
they did another one and it made about 52x
how many 550rwhp AFR cars are there?
the only car i remember that made huge numbers it that one 402 mikey at rapid motorsports did
they did another one and it made about 52x
how many 550rwhp AFR cars are there?
Dstroyer, remember the cam theory we were talking about the other day in the thead about how much hp I would make? I'm wondering if that is coming into play here?
Originally Posted by Beast96Z
Well, I was basing most of my theory off of Rapids cars. I thought I had seen at least 2 of them break 550, and then his "emmisions legal" package made 502. It seems as radical as destroyers camshaft is, that he should of at least broke 525 no problem.
Dstroyer, remember the cam theory we were talking about the other day in the thead about how much hp I would make? I'm wondering if that is coming into play here?
Dstroyer, remember the cam theory we were talking about the other day in the thead about how much hp I would make? I'm wondering if that is coming into play here?
Yeah but I wouldn't base too much of your opinion off of one or two graphs. You have to remember that a lot of these motors simply wont flow enough air with the intake and heads we have available to us. Wait until the ET headed big inch blocks hit the dynos. Then we shall see.
Nate
Originally Posted by Nate_Taufer
Yeah but I wouldn't base too much of your opinion off of one or two graphs. You have to remember that a lot of these motors simply wont flow enough air with the intake and heads we have available to us. Wait until the ET headed big inch blocks hit the dynos. Then we shall see.
Nate
Nate
Don't take any of this as bashing. I'm just trying to figure out why some can and others don't.
Originally Posted by JakeFusion
Most 402/408s with AFR 225s with FAST 90 and 1-7/8" headers and 250 deg cams are around 515-530. I haven't seen much more than that, and he doesn't have full 1-7/8" headers.
Retarding the cam will help a bit, but your numbers are on the lower end of what's expected. Compression is probably too low for that big of a cam, especially with the 4 degrees of advance. I would have milled down to 66cc at least, but even then, that'd only be good for maybe 10rwhp.
Retarding the cam will help a bit, but your numbers are on the lower end of what's expected. Compression is probably too low for that big of a cam, especially with the 4 degrees of advance. I would have milled down to 66cc at least, but even then, that'd only be good for maybe 10rwhp.
After doing some math, it looks like his dynamic compression is relativlly low at 7.9-8.1 depending on certain parts. The cam is a bit large for the combination. It looks like a comp XE-R 244 intake lobe would have provided you with a 8:9:1 DCR, which is more in line of where you would want to be N/A.
Those are some great #'s I would think if you want more power you would use a smaller Cam to keep the DCR higher. We ussually use 244/248 with .610 lifts on a 110-112 duration and they put out 520-550rwhp.Either way I bet the midrange looks sick
I would think if you want more power you would use a smaller Cam to keep the DCR higher. We ussually use 244/248 with .610 lifts on a 110-112 duration and they put out 520-550rwhp.Either way I bet the midrange looks sick LS1 Tech Stories
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Verdad Gallardo Retarding your camshaft will result in further loss of low to mid rpm power, with maybe a minor gain in peak power. Like I said above, your bleeding off alot of compression with the size of the cam, resulting in lower than average numbers. Something in the 240-244 range would keep your DCR up in the high 8's which is almost a full point in compression. I could only assume that your numbers would only come up, like Slowhawk reinterated, with the smaller cam/higher DCR.
Check this guy out: https://ls1tech.com/forums/dynamometer-results-comparisons/415268-ffhp-408-dino-numbers.html Same CI, less intake manifold, and a much smaller cam, produced nearly the same numbers as yours. Throw on the 90/90 and he should see 20 rwhp, putting him in the 530 rwhp range. And on a Mustang dyno at that. No telling where he'd be on a dynojet.
Check this guy out: https://ls1tech.com/forums/dynamometer-results-comparisons/415268-ffhp-408-dino-numbers.html Same CI, less intake manifold, and a much smaller cam, produced nearly the same numbers as yours. Throw on the 90/90 and he should see 20 rwhp, putting him in the 530 rwhp range. And on a Mustang dyno at that. No telling where he'd be on a dynojet.
Last edited by Beast96Z; Nov 27, 2005 at 11:22 PM.
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From: Orange county n.y.
Originally Posted by TTPMatt
We did not get a good reading on the AF on that run. I'd like to get some miles on this motor and see what it makes then.
Michael M.
Can't wait to drive it tommorrow night
This was an old run dyno sheet before I worked out the bottom a/f. Also, I couldn't even street tune the car because of the expired reg. We informed destroyer to get a few more miles on this thing and we'll do the final tune.
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Finaly got to drive my car tonight and it RAINED the whole ride home 
but at least i got to put some miles on it 
Matt, I'll get in touch with you tommorrow and see when we can finish this up Any more power in there with some fine tunning 
Thanks TTP
but at least i got to put some miles on it Matt, I'll get in touch with you tommorrow and see when we can finish this up Any more power in there with some fine tunning Thanks TTP 
Houston, i have a traction problem