Discussion in 'Race 400/430/455' started by TheEternalDance, Jan 15, 2021.
Those 66mm on a 500hp engine at 8lbs will make 750ish
The dual quad off yes,..BDS does a beautiful job much better than Hampton
Familiar with turbo camshafts, but it’s best to have a custom grind made. I use Scotty for my cams. I run a twin turbo Buick 350 so message me if you want more advice
Any updates? Post pics of the car! I’ve seen it before I almost bought it...
You will love scotty cam grinds.....don't bench race as comparing numbers to box stk big companies......cause his numbers are sometime very different......but his will work better I promise you
Agreed, I didn’t even talk numbers when I talked with him to spec my cam. I simply explained what I was doing with the car, gearing, weight, turbos, etc and he worked his magic.
Thats what I do, but sometimes you can't bench race his final numbers cause they sometimes look drastically different than what we are used to seeing......but im sure that's why his cams work drastically better!!!!@
Not a lot of updating to do, unfortunately - but I can't resist talking about it.
If you're familiar with the car then you know I bought it as a roller and have been working on planning the power plant build-up. Long term, there will be a big stroker Tomahawk feeding the twin turbos. BUT there's another project I am still finishing that has taken all of my free time (and drawing out that Tomahawk build...) which I have yet to post about, but will hopefully get to soon - quick teaser: 1970 GSX Stage 1 4-speed that's getting a TSP-built 482 stuck in it - here's to fingers crossing it'll be ready for May!
On the Skylark build, I found two running blue blocks I picked up some months ago and tore one down. Back from the local machine shop just a few weeks ago and short block checked out okay. Sonic check was okay but not as stout as I was hoping. Interim plan is to build that block up with parts I'll end up throwing on the Tomahawk. TA Stage 2 TE, TA SP2, CSU carb/hat, and thanks to all your guidance, looking like a scotty cam grind. Any specific recommendations for pistons with boost? For or against?
Once the GSX is up and running the Skylark will be getting much more attention, but in all honesty it's likely going to be 2022 before the Skylark sees the road again . But when it does...
All good I understand, my turbo Skylark has been parked for a few years waiting for me to get life and other cars in place. Any good forged pistons will be fine. Plus I wouldn’t worry too much about getting zero deck (piston flush with deck) with boost it’s less vital vs NA.
Hard to beat JE for Pistons
Agreed, diamond is also very good.
I don't know if this helps at all, but when I bought my custom cam from Scotty Brown here's what he spec'd for my twin turbo build. Keep in mind though that it's for a Buick 350 that I aim to run only 6 - 8psi since it's an otherwise stock engine. Unfortunately I'm still working on it so I can't report how well that cam works yet!
Wicked! Thanks for the suggestions and intel - all great to keep the plan going.