Thanks...and sorry if this is a repeat, I did a couple of searches and didn't find what I was looking for.

Curious to know what the conventional wisdom is on the amount of boost and hp the stock TT bottom end will take.

Also, curious to know what the "general" HP is from a set of 16/24s w/matching ECU and 100 cell cats...where's that going to put you?

 

The general consensus is 600 to the wheels. Sam Shalala says 640 torque is the breaking point (more important as cause of rod failure than hp). Don't run more than 1.4 bars of sustained boost, that is fo sho.

The key is proper tuning. There are some Protomotive cars pushing 700 to the wheels on a stock block. I am considering upgrading to the proto fuel system and gettiong close to 700, but I am concerned about my rods.

ECU and exhaust will get you no where near limits of bottom end. Not even close.

 

700 or so crank seems to be the consensus.

 

Doesnt Suman have a stock block and isnt he putting more than 600 to the wheels? Suman if you could chime in that would be greatly appreciated and what fuel are you using, out here in San Diego we unfortunately only have 91 at the pump.

 

I would say 650 rwhp on C16 only. 600 rwhp on 103 octane

 

Mark,

I have been pushing 590 on 93 for a while now...no prob (knocking on wood).

 

700whp on stock bottom end unless your over 40k miles where your rods are the weak link. Also this is assuming your running cool afr's and race fuel. I put a healthy 720whp down and I beat my car daily. But only with 104 unleaded here.


Suman

 

You guys make me sick!!!!!!!!!

 

Suman is your car awd or rwd?

 

just for safety I would run only 100+ octane on boost higher then 1.25 bars.
this is just my opinion.
markski

 

awd, in rear wheel drive the car is utterly useless on the road. it makes boost so quick all I do is spin!

Suman

 

what does a built short block cost (range), what do built heads with cams cost (range)?

 

There are different philosphies as to what consists of a "built" bottom end as well as a "built" top end. A bottom end can consist of as little as studs and rods and the options go up from there. Same for head work. You can spend as little as 6-7K for a rod install from a good independent as a winter project during the slow season or you can spend well into the tens of thousands... Take your pick and decide what your comfort level is and your power goals. Kevin

 

what does a ***** to the wall shortblock, upgraded pistons, rods, crank, etc. with ported heads run?

 

5K for the heads. 3K for the crank, 5K for the rods and pistons, alot more misc. work needs to be done. I say $25K