I bet I could find a thick head gasket that could get the compression down to a reasonable level.

 

That may be a bad idea - to add those 4cc's back with a head gasket will require about .020 added to the gasket. If you currently have a .040 thick gasket, even .060 is higher than where you want to be.

Adding that kind of quench will make your engine more susceptible to detonation. To get max power and max compression, you are better off to have the volume in the chamber or the dish of the piston. Large quench volumes don't give the fast burn you're after for efficient combustion.

 

I feel confident enough with my tuning ability's that I believe as long as I can get the compression under 12:1 that I could run on 93 octane. It has been done, I might have to keep a lap top in the car all the time but I'm already use to that.

 

I wouldnt want my car at 12:1 and try to run on the garbage gasoline they give us these days, but thats my opinion.

 

The PRC 215 head is definately a great option for this thing. I think I have another great idea that should really help the bigger cube setup. The all new PRC 227cc heads are built with bigger runners & valves, but still keep the smaller chambers for guys running smaller bores. I'm running a set of the 227cc heads on our shop camaro & they really move some pretty nice air for small bore setup. Pricing on the 227cc heads will be right there at the same point as the 215 heads!!!

 

do you have a dyno graph of these heads? I would like to see the torque curve. Also I don't see them on your web site are they up yet??

 

I hear you on the crappy gas so I would be mixing at every fill up. either octane boost or home brew @ 12:1.

 

i had a set of lpe cnc'ed ls6 heads and a mild cam as part of the lpe 383 package, i know if i would have just added the vrx5 cam i would have picked up some top end but nothing close to the 120rwhp and 70ft/lbs of tq by adding the tfs-tea 215 milled to 61 cc's 11.6 c/r. if you have the money get the tfs heads the torque curve they produce is a flat line..watch
http://www.youtube.com/watch?v=KAB1H4F5pvs

 

I've got to ask why you think you need a 12:1 383 that requires a higher octane mix to meet such a modest goal. Mixing fuels for a road car is a pain, and unless you only fill up a couple times a year, will make your car more of a hassle than necessary. Mid 400's with lots of torque should be no problem with a 383 as long as you plan accordingly.

Rule number one is to be totally honest with yourself and the vendor you are working with, and let your application determine what you should be building. Attention detail and selecting parts that are complimentary will get you much farther in the long run. As has been said many times before, combination is the key.

Case in point - if you watched the video, the setup above made some great power, well over your goals, with less compression. With the extra cubes, and the proper combination of parts, you should be able to hit 480+ HP and 440-450 LB-FT at compression that is manageable on pump fuel.

9secondsflat, can you give any details to the cam used in your previous setup?

 

that is pretty awesome, i have the exact same cam as you, and i am planning on putting on afr 205 and i have fast 90/90 as well.
do you have a dyno sheet?

 

Wow nice numbers, the dyno sheet makes it look like a easy driver too, what was the rest of your setup? Thats got me pretty much sold right there!

 

the lpe cam as part of their 383 package was a 207 220 571/578 on a 118.5 centerline...my new set up consists of the following: vengeance ported fast 92 intake, a vengeance ported ls2 t-body, a vengeance vrx5 cam 236-238 601 605 113 center line, kooks 1 3/4 headers- kooks 3x3 catted x pipe, corsa exhaust, ati underdrive, meziere electric pump, fast 36 injectors, tfs 215 from tea milled to 61 cc's- yella terra rockers.. everything installed and tuned by carmen at the vette doctors (btw i had the was given alot of bs from the vid from people saying the car cant dyno at that power so i had it put on a local DynoJet Dyno and it pulled 549 rwhp 487 rwtq...) they use a dyno dynamics set to sae...and it pulled 532/472. i was at the worcester, ma car day about amonth ago and ran from 30 -150 on the highway a new zr1 and ran side by side...two weeks later the owner aproached me at paul masse vetacular and asked if i had a blower or a bottle...he said the car was flat out and he could not pull me ...to be honest i had bfg drag radials on and they gave the car the kick and jump on every shift as opposed to spinning if i had my other wheels which have mich pilots...over the years i have pissed away over 100k on tweaking cars...and i can honestly say with out a doubt the tfs 215 heads milled to bump the c/r to the mid 11's along with a decent 230+ cam around 600 lift and a fast intake will destroy any afr or ls6 ported, milled, cnced head period...no issues no doubts...i will sit side by side with any 600cc bike and destroy them from 20-30 to 150 and if i get the jump on a liter bike they will catch hell trying to pass me....spend the money on tfs heads..buy the yella terra's and a fast 92..dont do it half ***...speed costs money do it right the first time...learn and listen to people who are running very fast times (quicker then me in the 9's like ECS, Vette Dr's, Vengeance Racing) and most of all DONT USE A ******* HACK TO DO YOUR WORK OR TUNE YOUR CAR!

 

Well I do all my own work and tuning so no problems there, if we didn't live on opposite coasts I would love to see your car, it sounds awesome! Im pretty sold on the TFS215's after seeing your videos. Ive owned other TFS heads and been impressed with them as well, actually the last 383 I built had them so I guess I should just keep a good thing going. I will enjoy taking this car to the track but most of the time I will use the car will be to go to the parts store or go on a road trip with my wife and baby so drivability is as important as AC to us, in case my wife has to drive or something. This will be the first car I have done that will not be a complete custom or complete race car. Do you have a cage in your vet?

 

Tony Mamo put down 540 with his 383 and a set of AFR 225's on top.

 

where they had ported or out of the box? and what cam??

 

tony used a solid roller cam.

 

i have a four point bar with harness...it does not get in the way like a 6 point bar. i have 99% use of space in the rear.

 

Well that kinda defeats the DD friendliness of the car, what was the duration of the cam?

 

from memory, i believe it was a 242/248 on a 114 center line

 

Who says 383 cant make BIG power????

383 Engine Dyno-Results (graphs included)

Edit - thought this might add to the discussion as well
Competition TFS 215 vs new AFR 215 heads !!
I wonder when Tony will start posting information on these heads in the forum.