You can type here any text you want

10.5s or 550 rwhp max on 25lbs boost

Welcome!

By registering with us, you'll be able to discuss, share and private message with other members of our community.

SignUp Now!

psycho6cyl

Ponies Are For Lil Girls
Joined
Feb 11, 2005
Messages
1,908
I was curious if this is possible. I still have to choose a turbo. I was thinking pt6766. Also I need heads. I was thinking champion irons are great for me at this stage. Do i need the champion intake or stocker is fine? Im assuming internal wastgate will also get the job done. I know i will need new chip and 2nd nozzle alky but i need to buy some parts just to get back in the game. I will also be rebuilding trans w new convert,but thats for my xmas bonus :D thanks

Also all parts in sig still current
 
I would not use a 67mm compressor wheel for that combo. Even an old cast one is way too much for that power level. A forged milled race engineered 67 wheel will be a bitch with a small wastegate. Id use a 62mm compressor at most and probably just use a forged milled 60-1 replacement or a GT35r ocmpressor or its milled forged replacement. You should be able to get it done with your 61 as long as it has a t350 or 76p turbine. Cam, heads and CR and tuning. Thats what will get it done. Just square up the port exits on the stock intake manifold and remove the egr tower. Id likely use an aggressive 218 hyd or possibly slightly smaller grind and shoot for 9:1 CR. Build the engine to make peak power around 5500. This could even be accomplished with an old cast 60-1 and 76p ex wheel. I made 592whp with an old 60-1 using a cam as described above with 9:1 @23psi. On the same day i made 657whp with a 6265@25-26psi. 697@29psi. 25-26 was the lowest pressure i dynoed at with the 6265. The heads were GN1 race ported. The same engine went almost 140 mph with a 70GTQ@25psi on 93/alky. All these were done with a stock style swing valve assembly. No external gate. If you used a custom solid grind and the same heads i did you could make even more power at even lower boost. The trade off is low cylinder pressure at lower rpm which requires a looser converter to make it work properly. You shouldnt be using more than one 15gph nozzle if you have a razors alky kit to support the needs you want. Id spend the $ on the trans, rear, and driveshaft to make it last.
 
Well my 61 is shot hence need for new turbo. i see you sell turbos. Is there any way to get in contact with you and purchase a turbo and heads if you can supply those too.. thx for advice
Jeff
 
I agree, a 62 will get the job done, the 206 cam you have may even work IMHO, heads and intake will be needed along with a good converter. Have that old 61 rebuilt, save money on cam and put it into trans, converter and suspension and spend time on tune.

Thanks
Bill
 
This is all street car i have booster for brakes. W a 218 cam will that matter w vac etc for stopping under normal conditions?
 
you don't need a 218 cam to make that kind of power. I like the 6776s. It's more than enough for that power level, but it gives you room to grow if you wanna get faster.
 
Black Power said:
you don't need a 218 cam to make that kind of power. I like the 6776s. It's more than enough for that power level, but it gives you room to grow if you wanna get faster.
You sure don't need a 218 but the family of lobes I'd use will have a lot more area and a 218@.050 lobe will only have a little more overlap than common 212 lobes. Increasing the engines operating rpm via cam profile and head/spring is the best way to increase mass flow through the engine in this situation since he wants no more than 25psi. There's probably 40-50whp more using the lobes im thinking about running the same boost with the common lobes and the overlap is only slightly more. The downside is he will need more expensive springs and lifters to take advantage of the cam.
 
psycho6cyl said:
This is all street car i have booster for brakes. W a 218 cam will that matter w vac etc for stopping under normal conditions?
The overlap will matter. Not necessarily the duration at .050. The overlap changes by lobe family and how the lobes are ground into the blank. If you want to have effective vacuum at less than 1000rpm you will need one of the smaller cams with 112ls or possibly 113-114ls. If using an iron head I'd use a small 212 lobe with 112ls. this will sacrifice some peak power but will increase the power left of peak. You will need to increase boost to make the same peak power as cams with less separation and more duration.
 
If the OP does change cams from the 206 ( do we know what version cam he really has? ) how much power in general are we talking in gains to the 212 vs staying with a 206, is it really worth a change?

Thanks
Bill
 
I was curious if this is possible........ :D thanks

We have done this build on many GN's for lots years, and with recent build we still use our favorite street/strip turbo the TE-45A! :)

With the proper converter and a Garrett turbine housing, the car will be a terror on the street, and run to 10.0 at the strip when prepared properly.

Using iron heads that are well ported and the 206/206 cam, you can easily go low 10's.
 
Back
Top