scheides

iTrader: (10)

Any pics of the smaller tube setup dave? Would be cool to see a little more testing in that area, or perhaps an inbetween size? The gains in the midrange on a car that wouldn't be doing max-effort 40psi runs and instead hitting the streets at 'only' 30 are seriously impressive.

More on-topic, the car is looking hot and I love the valve-cover bolt kit is a really nice touch. Awesome setup, don't mess with it too much, have some fun with it this year!

Challenge for you? Take this car down the 1/4 mile track yourself a time or two this year. Don't publish the results, just for fun!

vwjeff

iTrader: (13)

Great job as always Dave!!!

I hope my car turns out as good.

bolio

Thanks for all the testing to the Buschur team. Dave, was the Fullrace header you ran 9's with have the smaller runners and any info on what the test turbo was?

lekonna

testing rules. good job.

here is a comparison on 38mm vs 42mm runners on 2l 450hp setup on spool-up times

http://virtuaalitalo.fi/media/sarja_spooli4.gif

there is a definite effect on spool for sure. its a twin-scroll setup. no effect on the higher end power on this but with a low rev limiter and something not breathing properly on the setup.

crispeed

Wait till you start playing with gear correction!



Now just add some sending units so you can log oil, fuel and coolant pressure.

AWD Motorsports

iTrader: (211)

Cris doesnt drink but Im sure hell accept 2 dinners..

Glad you are getting things sorted on the Haltech.. NOTHING i have used has ever run as smooth as Haltech..

Mike

crcain

You like to log coolant pressure? That sounds interesting.

crispeed

Yes it is.

[I.R.A.]_FBi

i'm not trying to be an *** but why would you log cooolant pressure?

crcain

My guess would be to see when the head is lifting.

bostonhatcher

iTrader: (18)

bingo

David Buschur

iTrader: (53)

The FR header I had at one time was large tubing. The transition at the head on the small tube header we tested had a long transition built in to match the head port. The small tubing is hurting power, it's not going to get any better by putting a twin scroll turbine housing on it, better spool up but not better top end.

Spent the entire day testing today, it's nearly 5 pm and I just got sat down at my desk.

Finished the cam testing and the turbo testing.

The turbo gained a little bit up top, maybe 10 whp with some losses in the low and mid range.

The cam testing was just like the turbo, about 10 whp up top with some losses in the low/mid range.

I put the car back how it was, HTA86 and the BF272 cams. I am not willing to accept a loss in the low/mid range unless there is SUBSTANTIAL gains up top and even then it's tough.

I think for the goals I have I have built the perfect set up with years of testing it's getting tougher to improve on this set up. I guess running 9.0's at 159 at 2950 pounds kind of proves the set up is pretty optimal.

As for the cams. I was so sure I was going to be blown away by these I bought 5 sets. While the cam did gain some power up top, the low/mid range losses were about 20 whp, for some that doesn't matter at all. If anyone is looking for a good set of cams I will sell these cheap, $575 per set. They are 272 duration, .460 lift. You will need good springs/retainers. (5) sets is all I have an all that will be built.

CWiLL

iTrader: (9)

who doesnt log coolant pressure






ps
ill tell u my coolant pressure if u tell me urs lol

EvoDan2004

iTrader: (94)

dave is that it for cams or are you going to try a few others?

bostonhatcher

iTrader: (18)

Dave I would have to say your setup is pretty optimal, like you said. To get more substantial gains with both low/mid-range and top end you're going to have to go back to the drawing board and start innovating a new setup with new parts. Something that the 4g63 hasn't seen before...