PTK Turbo

If I change my cam, pushrods, valve springs, timing chain/gear, lifters, and roller rockers.

You think that'll be enough for my motor to handle 8lbs of boost for 70 miles... assuming I don't beat the crap out of it? If not 8, 6?

What do you think a motor with a cam and this turbo would make at the wheels?

I assume you meant 70K miles right?

Problem is if your motor is going to pop from the HP you gain on 8psi from that kit it is not going to be any of the items you listed. Springs are a good idea but if somehting is going to break it's going to be much more catastrophic than those items. I would say first to go would be a piston, block, or maybe a rod or rod bolt. Not sure where the weak link in an LT1 is but stock pistons are always weak. :)

The stock hypercraptic pistons are the weak link. They will live fine as long as you never, ever see any detonation. Ping it a couple times and say bye bye ring lands

I am trying to stay away from the block/crank...

I was figuring going as far as pistons and connecting rods.

I would even run 6lbs of boost... just trying to figure out how much the motor can handle?

If you keep boost low, it will survive for a while, but its still a ticking time bomb. The LT1 in stock form was simply not designed for boost. Slap a set of pistons and rods in, and you can make BIG power.

BTW, a customer of mine this weekend with a simple 355 with eagle internals and a PTK Gen 1 system with 76GTS, 13psi and 93 pump gas went:

60ft 1.58
1/8th- 6.63@111.43
1/4- 10.17@139.90

Thats with a 6spd car and full weight 3680 lbs. You don't need a huge and $$ motor to make big power.



Jose

wow..what kind of power did he put down. almost 140 at that weight is very very impresive.

Have no idea, I don't know if he has even dynoed the car. I calculate around 650rwhp or so. I maybe off though....

Jose

How much did he pay for those parts? How much for the installation?

Its a DIY kit, so he installed it himself. As for price, it was the old Gen 1 kit, so prices were different. The Gen 2 kit is just a more improved version with larger IC and larger crossover piping and different placement.

Jose

Here is the entire combo...

355 , eagle rotating assembly with JE slugs
ported stock heads w/stock valves
ported LT1 intake
baby turbo cam (only 218/218)
12 bolt rear w/3.42
Gen 6 DFI
6spd/street twin combo
Gen 1 LT1 PTK kit with 76GTS /3" downpipe
13psi on 93 octane pump gas.

The intercooler was straight ice/water, IAT reached 78 degress at end of pass.

Jose

BTW, a customer of mine this weekend with a simple 355 with eagle internals and a PTK Gen 1 system with 76GTS, 13psi and 93 pump gas went:

60ft 1.58
1/8th- 6.63@111.43
1/4- 10.17@139.90

Thats with a 6spd car and full weight 3680 lbs. You don't need a huge and $$ motor to make big power.



Jose

Thats awesome performance, and a 6 speed full weight street car no less. Stock heads too. and 78 degree IATs :eek:. simply amazing.

He is going back this weekend to try race fuel and meth injection. I really want him to try a run with and without meth at the same boost. That will tell us how much hp some of these meth injected setups are aided by ;).

Jose

10.17 now thats what Im talkin about!!!! :D

ported stock heads w/stock valves

baby turbo cam (only 218/218)


Jose

Do you know (Can you say?) who ported their heads and also who picked their cam ?

I picked the cam, and do most of the time for my customers, but the heads, have no idea. But with stock valves, they aren't going to flow any crazy numbers. Probably 240-250cfm.

Jose

I picked the cam, and do most of the time for my customers, but the heads, have no idea. But with stock valves, they aren't going to flow any crazy numbers. Probably 240-250cfm.

Jose

Thanks. I was wondering about the heads because of the single pattern cam. The car is making awsome power, and I was just wondering if the heads had good exhaust flow, or a good e/i ratio . Basically i was trying to find out if thats what made you decide to go with the single pattern cam. (Which seems to be working well.) :eek:

Isn't that about the same "size" cam INTMD8 uses?

Not sure if Jim is using that cam or not.But its probably pretty similar since I think Jim said it was a small cam. You can't get much smaller then that..lol. Reason I chose that cam though, was the owner said his exhaust runners were not worked much on. Also the LT1 doesn't flow as well on the exhaust side as an LS1 which you can run a reverse split with great results if using a true turbo header system. On the LT1 with the exhaust runner not being worked much I like to hang the valve open a little longer on the exhaust as long as the system is running an efficient turbo and header. Now if the design of the turbo system uses a log manifold, then I run a reverse split, even if the exhaust port flows great. Reason being is a log manifold elavates exhaust backpressure substantially which can lead to reversion.

Jose

The owner dynoed his car yesterday....he called me with the #'s are below. I'm wondering what a T88 would do in its place. I am thinking of sending him my T88 and 3" dp to test it...hmmm

Results were with C16 and straight ice water in IC @ 18psi. The ice water fudges the correction factor a bit, but I calculate probably 15-25rwhp less.

828rwhp@5700rpms
878rwtq@4300rpms


Jose

The owner dynoed his car yesterday....he called me with the #'s are below. I'm wondering what a T88 would do in its place. I am thinking of sending him my T88 and 3" dp to test it...hmmm

Results were with C16 and straight ice water in IC @ 18psi. The ice water fudges the correction factor a bit, but I calculate probably 15-25rwhp less.

828rwhp@5700rpms
878rwtq@4300rpms


Jose

Awesome numbers! What do suspect he'd make on pump gas?

Well the track #'s he ran which was 139.90mph at 3680 lbs, is about 640-690rwhp...somewhere in that range. That was on pump gas, 13psi and ice water.

Jose

The owner dynoed his car yesterday....he called me with the #'s are below. I'm wondering what a T88 would do in its place. I am thinking of sending him my T88 and 3" dp to test it...hmmm

Results were with C16 and straight ice water in IC @ 18psi. The ice water fudges the correction factor a bit, but I calculate probably 15-25rwhp less.

828rwhp@5700rpms
878rwtq@4300rpms


Jose

Must resist... urge... to use... credit card... :D

Simply incredible, what does his fuel system look like to support those numbers? :)

The owner dynoed his car yesterday....he called me with the #'s are below. I'm wondering what a T88 would do in its place. I am thinking of sending him my T88 and 3" dp to test it...hmmm

Results were with C16 and straight ice water in IC @ 18psi. The ice water fudges the correction factor a bit, but I calculate probably 15-25rwhp less.

828rwhp@5700rpms
878rwtq@4300rpms


Jose

Man thats nuts :eek: :bow:

I too would like to know how he did his fuel system.

He copied my fuel system which is simple and consists of just dual inline HP 255 walbro's, sumped tank, 10an feed, 6 an return, 72lbs deka's and the fuel rails modded for the AN fittings.

Jose

BTW, he is going to run it with that setup this weekend and try some other things for me. I hope the drivetrain doesn't take a dump. He is still running the stock 93 6spd which isn't as strong. So cross your fingers....lol

Jose

Out of curiosity, is that 355 still a 2-bolt main?

No its a 4 bolt splayed conversion. I don't think I would push the stock 2 bolt that far, but that is just me. I have some pretty crazy customers though that do some questionable things...lol

Jose

New track results are in..I will try to post them later, when its less busy today. Track was slick so the ET's weren't much better, but the mph was alot higher. ;)

Jose