George What was the 60 foot time on that run and on the 7.98 run? Based on the little information from both runs I would think that your 60 foot times have improved.

Stan

Off hand I don’t remember, I’ll check in the morning. I do remember that it (the 7.98) wasn’t a good run, it spun the tires and didn’t pull in 3rd gear.



GTO George

Well after racing all year I’m putting it to bed in one piece! Can’t wait for next year, only 2 changes an high helix blower and a new distributor.
I did what I wanted to do run 7’s or the 1/8 mile equivalent all year in hot weather.


GTO George

Oh yea.....heads never came off and ran only 11 lbs of boost. Last pass was a off the gas, on the breaks 5.08! I would guess a high 5.05 1/8 mile et.


GTO George

So it’s the new year so it’s time to get ready for Tsing season! I have my money for the high helix 8-71 blower also got my programmable distributor for Christmas, just bought on eBay a System 1 reusable oil filter, now all I need is valve seals.....it’s all down hill now!! Also bought me another bump box......cool!


GTO George

George, what are your performance goals this year?

I don’t know.......good question. I guess it depends how much boost I can get out of the high helix 8-71. With the better rotor design I will get more hp with it being more efficient.


GTO George

I accomplished what I wanted to do with the set up I had.....7.90’s in 80 degree temps on only 12-13 lbs of boost.



GTO George

So I called The blower shop to see about a Blower and they said 6-8 weeks.......damn lucky i didn't wait to the last second to order. High Helix......Billet Rotors.....Billet Case.....Teflon strips on the Roptors and everything inside Anodized and YES it will work with my BDS intake! Guess my Blower will be up for sale.......without input shaft......Best offer!


GTO George

Congratulations on the new blower! Now, order a Birdcatcher to go with it.;)


Jim

Right now I’m staying with the carbs, the blower will be more efficient and will take less hp to turn......”less yank on the crank”!
I’m not sure how much more boost I will get, car can only take so much power.


GTO George

So this upgrading to a high helix blower is getting to be a Chinese fire drill. I thought when I first started that it would be a direct change.....NOPE. They (TBS) have 2 versions of the high helix blower one sits 9/16” further back then mine (going to hit the distributor) and the 2nd version sits WAY forward.......seriously? Don’t know which way to go BUT it will happen!


GTO George

How far forword George?

GT

Your old blower probably was completely open on the bottom, not the most efficient way to move the air. The high helix blower will have a much smaller and different shaped air outlet on the bottom. That location will determine how the blower works with your manifold. There will be an imbalance between cylinders, especially with your very low profile BDS manifold. Even with my Gutsram intake I put more air and fuel into the front cylinders because the blower is set forward. That's why it's essential (in my view) to tune by port as well as by hat injectors. Talk to the manufacturer about your options and what will work best with your BDS intake. They should know and be willing to work with you on it.


Jim

Well im waiting on that answer now BUT I think its 1" further forward then their standard blower which means ill have to buy a new imput/snout and idler pulley mount.....lucky me! LOL! Pictures of forward offset blower.....standard blower and air outlet of blowers.


GTO George

They said the back cylinders may run lean..........BUT I've always had problems with only my front....go figure!


George

My front cylinders get more air from the blower, so I run bigger fuel nozzles in the front cylinders than the back ones. I fine tune by EGT (have a sensor on every cylinder). I balance the temps by cyinder and that's my final tune. My hat nozzles are all the same, but my port nozzles run bigger in the front, since the opening on the bottom of the blower is offset to the front. It's not a big difference between cylinders, though.


Jim

Problem is I don’t have that luxury, I’ll just have to jet the snot out the carbs and hope for the best. I have 210’s in them now......I have jets up to 224’s. This will be fun! PPTTF!


GTO George

Used to hang out with a Nostalgia nitro F/C when I was at the March Meet that actually ran different pistons front to back to make up for the compression difference. I think they were surprised that I noticed. Lots of tricks to getting all eight making power.
Good luck George!

I love going to the nostalgia races!
All I can hope for is richer up the lean cylinders and hope the rest aren’t too fat, luckily I run low boost.

GTO George b