Holset neon goes to the track

[David Bohrer]

Well, I went to the track to beat some bugs out of the car and was suprised by this final run:


2.1705 60 foot
5.6732 330 foot
8.4628 1/8
90.58 1/8th mph
10.8479 1000 foot
12.8411 1/4 et
112.75 1/4 mph

Given that the car would not hit high boost circuit boost on this run was as follows:
14 psi in first
19 psi in second
19 psi in third

I did run into a issue with the car not revving past 6400 rpm. So that the last 350 feet of the run I was basically cruising and not accelerating. A/F #'s and EGT's were going nuts but no detonation and boost was rock solid. I am working on this as we speak and I think I have found the cause but, a trip to the track is needed to verify.

All runs were on 93 octane with no meth or spray. The turbo is a Holset hx35 12cm^ with the divider removed. So, after porting and polishing I would say she is a 14cm^.

Opinions?

Dave B.

[Dave]

I'd say you definately have low 12's capable in that if you can, (1. Hook, (2. Get that last 350' down. You're losing a lot of time to that, but you know that. Might even have some 11's.

Good run! Got any pics?

[David Bohrer]

I try to launch as hard as I can without pulling thru the lights but, I do not have enough brakes to hold it past 2900 rpm. She just pulls too hard at 1 psi! If I can get the engine torev I could hit around 116 or so in the 1/4. As for elevens I don't think so even though I like your enthusiasm!. The lag is so bad that I do not hit full boost until about the 85-90 foot mark so that blows the whole run. I would need a little spray to kick it up a notch.

[Dave]

Yah, that lag and poor latches would definately limit you.

[bfarroo]

get the brakes to hold and a nice loose torque converter. Another thing I've seen alot of the Sy/Ty guys do is drop the car in N once your staged. Rev it up once and get some good vacuum while holding the brakes down good. you should be able to feel the pedal pull a little closer to the floor. Drop it back in drive and see how much it will hold.

[8valves]

That sounds like a pretty HUGE turbine housing!

AM

[David Bohrer]

Benji, Thanks for the tip! I will try that since I may go to the track tonite.

As for the AR it should be about a .89 or so in Garrett land.

[TurboGLH]

Thought about maybe using a 9cm housing off of a hy35 instead? Since your not utilizing the divided housing for it's intended purpose, the un-divided 9cm might be more up your alley.

[contraption22]

Your 1.22 transfer gears aren't helping the traction issue, or the staging issue. Find yourself some .91 gears and you will see an improvement.

[ohiorob]

nice run David, even with all the problems. working out the bugs should yield big results. good luck.

[GLHSKEN]

Keep having fun Dave