MaxxMitchell

iTrader: (4)

Im in the midsts of trying to figure out what i want to do next to my motor. Ive got a set of forged flat top pistons sitting in here in a box to net me 10.7:1 or better with a 64-66cc head.

Only requirements, are pump gas, off the self parts if possible, and would like to stick to a hydraulic roller cam shaft.

So far the AFR 1054 210's with my 288XR cam seem to be about the best way to go with out going and getting a custom ground solid roller cam in the 248+ duration range, with .630 lift.

Street manners are not a concern as the car sees the road on the weekends during a cruise, or on the way to the track.

What are some sick set ups you guys have seen that are proven to deep 10's with a car in the 3400lb race weight area?

Orr89RocZ

iTrader: (20)

deep 10's i dont know about hydraulic rollers and pump gas n/a but i bet it could be done.

something like a 406+ inch with a big hydraulic roller, and AFR 210s is a start. 87 TA has a 406 that has done 10.8's with a 242/242 solid roller and AFR 195's, old style. you could simulate that build with a comparable hydro roller. I'd talk to a cam grinder and make up a big hydraulic roller grind on a 406. Something near 240 on the intake can be done and make near 450 whp on a 406 at probly 6000-6500 rpms. I've seen some 383 LT1s push near 430-450whp with a high 23x's duration hydraulic cam and great heads and compression.

My 383 should be mid low 11's i hope. its AFR 195 with a custom hydraulic roller, 230/245 with .600 lift. Dont want to make claims as i dont know what it will do yet but its stout. Add a 150 shot and its 10's all day

MaxxMitchell

iTrader: (4)

I would like to stick to the 383 I have currently, if I end up going bigger in the future I might just go big block.

I'm just up in the air on changing heads and pistons if I’m not going to drop near a second, or pick up 8-10mph. Then again just for the weight savings of aluminum heads over these HEAVY thick deck cast iron heads, plus the minimum 30rwhp I will pick up from bumping compression and a better head might make it worth it there, but maybe not $2,300 worth it (machine work, heads, pistons, gaskets)

Im already starting to get the, "Well while im doing this I might as well do this" bug, and considering a K member, Circle D converter, and larger headers lol.

Orr89RocZ

iTrader: (20)

well the 10 second combination is exactly that, a combination of parts that are required to run 10's

Suspension, weight savings, motor and trans. It does cost abit of money to do 10's consistantly

If you already have a 383, then swap out pistons for higher compression, near 11 to 1 if possible. Then you should swap heads as heads are the most important part of that build. AFR 210's should be considered. TrickFlow 215's arent bad either. There are other 200-220 cc heads that could be considered as well.

You will need near 450whp to run 10's at that weight. closer to 500 to get low 10's i'd say. I believe a 383 can do it with AFR 210's and bigger roller cam than i have. I expect my build to be around 400whp but it should/could make more like 410-420 depending. I hope the stock MAF isnt a restriction. I know cc306 cammed ported stock head LT1 cars have made 410-430whp with Manual 6 setups. Another bit milder setup made 406whp thru an auto. In a proper weight car, thats high 10's low 11's in perfect conditions

definately do aluminum heads for weight savings. That alone will help ET alot and justify the cost.

Your cam is ok, but could use more lift to complement AFR 210 heads. Duration is ok but i wouldnt hesitate to get abit more. 242/248 roller cam would be nice. SHould peak around 6500 rpms and rev to 6800 easily. I'd still do a solid roller tho, nothing crazy just something with good lift and medium duration. 240-246 duration at .050 on a solid is pretty street friendly. You could go as high as 250 i'd say and make 450whp with those heads. AFR 210s come already setup for solid roller cams, so its a good idea to keep a solid roller especially with the rpms you need to turn to make that power

MaxxMitchell

iTrader: (4)

Thanks for the info. Im interested to see what your car will do once done.

Sonix

iTrader: (1)

StephenIroc, IHI and the guy in saskatchewan all have/had really hot 383's at one point, not sure if they made it into 10's with them, but close.
Actually the guy in sask has a 400 block, but the combo idea is good food for thought.

online170

Not trying to raise trouble, but im curious how you came up with this? ( i dont know any better, so you are probably right) but im just curious.

It should also be mentioned, your car MUST have some SERIOUS suspension mods, and traction upgrades to be pull of 10s with such a "low" hp mark.

Some people get close to 600 hp with that weight, and can barely crack get quicker than 12s due to lack of traction, or loss of power along the driveline.

TraviZ

iTrader: (2)

my engine in my sig should run 10's when I finish up the little bugs that are stopping me
for reference you know..

Orr89RocZ

iTrader: (20)

Just going by what other cars are doing at that weight and in that power range. Its power to weight basically. I've seen 400whp cars doin consistant mid lower 11's at 117-118 at over 3500-3600 lbs race weight. 02-04 Z06 will make 370whp stock and run 117-118 mph at just under 3200 lbs

Another buddy put down 422whp i think it was and is running mid 11's at 122mph at 3700lbs. 1.6x 60 foots manual trans on a crappy track

So a lighter car in the 3400 range should need 450 to get 125-127mph traps which is good for mid high 10's. 87 TA on this forum has gone 10.8 at 125 with the 406 combo i mentioned above. 60 foot in the 1.4x range. Believe power to be in the 430-440whp range since the car runs abit faster than my 422whp buddy and the car is alot lighter.

To get the car to ET properly, you need the right gear/tire converter and suspension to get it to hook consistantly. 1.4x 60 foots with a proper stalled auto are required.

MaxxMitchell

iTrader: (4)

Your combo should run pretty good. I have a T76 sitting here looking at me, and a couple extras for it, but after building 2 Turbo LT1's over the last 4 months I want to do it on motor. Mostly because i want to stick with the stock GTA hood, and not switch to EFI, or add a carb hat that would require a cowl.

I have talked to IHI and got tons of information on his old set up. I just want to see how otheres have done it. Kamu has also done it but it took a decent solid roller cam and a 406, but went mid 10's at 130.

Anyone see a down side to running the 210's on the street? I have heard of the bottom end suffering when trying to drive around, but have not seen this in person.

As far as hooking it up at the track, that shouldnt be much of an issue. If I can trap where i want to be in the upper 120's ill figure out how to get it to hook. Shortly after the swap ill change conveters, and purchase a new rear end. Its fun pulling 5-6" of light under the fronts on the 10bolt, but we all know it won't last. My current set up is WAY understalled. Drives around awesome, but after ridding and driving a few cars with a 4-4400 stall it wont be too bad, and the launches are just awesome at low 1.5's to high 1.4's on a foot brake.

Orr89RocZ

iTrader: (20)

with gear and big stall, those 210's shouldnt be bad on the street at all with proper camshaft and compression i'd say shoot for 11 to 1 compression static and near 7.8-8.2 dynamic with a big cam. I'm at 11 to 1 static and 8.3 to 1 dynamic with my 230/245 109 lsa cam. bigger cam is less dynamic compression

TraviZ

iTrader: (2)

/agree
I wouldn't worry about the 210's being to much.

Orr89RocZ

iTrader: (20)

AFR's maintain good velocity in the port so you can have bigger runners. thats why the 195 heads are good for so many engine combos from mild 350's to pretty hot 400+ inch motors

ross

I have a 10 sec motor with pump gas. My pistons and cam are the only custom parts the heads are out of the box parts.Look up some of my old posts.

AlkyIROC

I blew up my 383 at the high 11 mark. If it had a better gear ratio at the time, it might have been a mid to low 11 second engine. It was running very high 11's at 118 MPH. That was also racing at altitude so maybe it could have gotten into the 10's at sea level.

MaxxMitchell

iTrader: (4)

Ya i have the advantage of my track being at 800ft.