JSACRA

iTrader: (2)

what to you guys think about this
eagle crank and rods
http://www.summitracing.com/parts/ESP-B12111030/
with afr l98 heads
http://www.airflowresearch.com/produ...products_id=33

http://www.summitracing.com/parts/ESP-C4102S/ these main caps will be put on orginal block

cam from compcams but dont know which one yet

im thinking it will puit the compression up to 9.5-1
any suggestion about the build what do u think the horsepower will be, also can go to high in the compression being that im in california wont pass smog and no to high on cam either, tpi will still be the manifold of choice porting and large to runners will come later

The Devastator

I built a 10.8:1 TPI 383 with dart iron eagle 215 cc int's and 64 cc comb chambers a long time ago. I don't want to discourage you, but you can't make decent horsepower with TPI. It is designed to make low rpm torque. There are plenty of minirams and single plane intakes out there to make high rpm torque. You wouldn't try to clear a building with a sniper rifle

Horsepower is Torque vs RPM. 500 ft lbs at 3000 rpm is 285.61 horsepower, while 500 ft lbs at 5000 rpm is 476.01 horsepower. Both engines have the same peak output. Both do the same ammount of work. Ignore horsepower its just means "how much high rpm torque". Remember that the best engine is the one with the widest torque curve.

Also the rotating assembly you picked is WAAAAAY overkill. You will never make enough power using TPI, 9.0:1 CR, and those heads to justify a forged crank and forged H beam rods. I would get a good steel crank and some aftermarket I beam rods with the good arp bolts. The four bolt splayed mains are also overkill. If you purchase those your machinist will have to line bore and hone the crank journals to use them. Thats usually another five to six hundred bucks depending on your machinist.

I figure if you make 370 hp and pass the sniffer you are doing excellent. Let us know how it turns out.

SeanW

I calculate that as 9.89:1 compression.
The splayed caps are way overkill. I personally see nothing wrong with the rest. Your heads may be considered small for an all out 383 but considering the limitations of your intake it will probably match up pretty well. The thing is going to be a torque monster.

JSACRA

iTrader: (2)

well what do u guys suiggest i really want the afr hjeads and tjhe 383 the inke and rest will be ported later the cam is pn# 08_508_8 i believe thats it

The Devastator

Your combination should work pretty well for daily driving and make lots of torque. I don't know if you will be able to pass the sniffer easily. The rotating assembly is good, its just way more than you need. If you have the money and want to get it, go for it. It definately won't hurt anything.

Let us know how it turns out.

mmadden55

I suggest http://www.cnc-motorsports.com/produ...01&CtgID=23956

Matching Dart heads (Aluminum) and a nice HR. Switch your stuff over to a nice miniram and you are ready to Kick a and take names. I run a SLP TPI 355 which makes good power. The above is the engine that is going to replace it.

JSACRA

iTrader: (2)

well imin california and i believe the highestucango is 10 -1compression heres a new setup

the cam http://www.compcams.com/Cam_Specs/Ca...?csid=214&sb=2

the heads still afr l98 either the 180cc or 190cc

the crank eagle, wither the forge or Hypereutectic pistons still dont now all the ins and out about both . im just trying to build a badass 383 or a crate 383 for my tpi and later maybe a mini ram, but do the tpi manifold and the miniram have the same style manifold bolt directions?

The Devastator

The EPA doesn't regulate compression ratio. Fuel and emissions laws limit compression. They regulate NO and NO2 (nitrous oxides or NOX as it is commonly called) which the sniffer checks for. Increasing the compression or bore size of the engine increase the NOX generated. That was the main reason that the auto manufacturers cut compression ratios so drastically in 1973. It is the most effective way to reduce NOX.

In California the maximum pump gas octane is 91. It also contains alot of MTBE to artificially boost octane of cheaper gas to their so called "premium". The TPI setup also has very good cylinder filling. Made the cylder pressure a little higher than normal. So be modest with your compression. I wouldn't run more than 9.5:1 on california pump gas. Especially if you are in a high altitude area.

I would not run hypereutectic pistons. I ran them in my NA 383 and they failed. I learned my lesson. Run forged pistons. Its worth the money.

A miniram,TPI,TBI, and carbureted intakes all interchange. You just need to know if you have early, late model (AKA "EFI"), or vortec heads and make sure your intake manifold is for that type of head.