Lickity Split

[hotstreetvw]

Diet
Last season I built a spreadsheet that included every cage bar, and estimated the weight savings; I also identified other areas of weight savings.  Based on my ET calculations, I would net about 3 tenths; putting the car pretty close to the 12.99 number without any engine changes.  So with the winter goal of pulling some weight out of the car, I embarked on a complete rebuild of the chassis, cage, etc.  With all the changes, I estimated taking the 1845lb pig w/driver down to about 1685-1690lb.  Well, I'm happy to say I was off a little bit in the calculations...or the minor things that I didn't track, just added up fast.  Friday I ran across the same set of Bandimere scales at 1625lbs w/ driver.  60lbs better than my estimate.  In shock, we questioned the scales.  Its just a number anyways right?  All that really matters is how the car runs down the track.

Exercise
Well I finished the "pro gas" engine.  This engine was built with a universal mag case I picked up a few years ago, a used CB 82mm.  Pistons and cylinders from an engine I had when I was in college!  I bought the heads, a set of Scat H-beams, a top secret cam (not really, and I bought it with a Christmas gift certificate! ha) and a nice shiny Jaycee pulley.  I used the 51s on my 4" engine, because I've got other plans there, so I'm selling my Spanish 48s to a buddy.

Results
Thursday night, I was loading up the trailer and took the car down the street and I was surprised.  It sounded nasty.  It felt a little scary.  I told my buddy Robert I was a little scared of it, he said we will call it a healthy respect.  I decided since it was a new chassis, and its been 6 months since I was behind the wheel, I would launch it, race to 1/8 mile and shut it down.

1.607 60', 12.243@108.62mph, First pass, It felt too good! I couldn't shut it down!
1.719 60', 12.828@107.52mph, ahh tire spin and some shake.  Missed 2nd gear.
1.666 60', 12.125@110.42mph, moving in the right direction.  I like that MPH.
no 60' time, 12.037@109.72moh, yeah baby this is going to run an 11 at altitude.
1.596 60', 12.098@109.58mph, and a storm is rolling in...

I just couldn't get that 11, and I don't know if I will have this kind of weather all year long.  Maybe a Wednesday night test, or maybe a late fall test.

There is still plenty in the engine to be found.  I didn't touch the jetting, and it felt like it nosed over a little in 4th.  I'm also at 32 degrees and they usually like a little more timing up here.  I need to pick up some bigger mains and take a look at airs.

Its going to be a fun year.

[Chip]

Glad to hear its on the track and that your changes worked well! 12.0 at altitude is great! Bring that thing to SLC 6 weeks!

[hotstreetvw]

Chip, I plan on making the salt lake race.  I'll be driving in Thursday night after work, so I might not be in town until the early hours, but I'm going to be there.  Assuming the car isn't broken.

Will

[hotstreetvw]

Salt Lake was fun.  The car ran hard, three 11 second passes, 11.99, 11.799 and a 11.712@113.6mph.  First round elimination due to a red light.  I'm going to spend some time working on the chassis to slow the vehicle reaction time down so I don't have to wait after the last yellow.

[Chip]

Nice job on the new PB! Impressive numbers for an NA car at altitude for sure! Well done. I may have to try making the tow to GJ this year to finish off the season. Gonna see if i can't pinch another second off my time during the next couple of months. Thanks for making the trip, hopefully the trip home was uneventful.

[richie]

Well done Will, all your hard work is paying off, that's good ET for that altitude

cheers Richie

[hotstreetvw]

Chip,  I'm glad you made it out.  It sounded like you were getting things sorted out as the day went on.  I don't think dropping another second will be a problem.  

The trip home wasn't too bad.  I left the track around 10:30pm and was back in Denver for my 7 years olds baseball game at 11am.  I was drained the rest of the weekend.  

I'll see you in Grand Junction!

Thanks Richie.  This little PG engine has been amazing.  I never expected it to run this hard and I think there is still more to come!

[Chip]

Chip,  I'm glad you made it out.  It sounded like you were getting things sorted out as the day went on.  I don't think dropping another second will be a problem.  

The trip home wasn't too bad.  I left the track around 10:30pm and was back in Denver for my 7 years olds baseball game at 11am.  I was drained the rest of the weekend.  

I'll see you in Grand Junction!

Nice work! I wondered why you ducked out early. Now it all makes sense.

[hotstreetvw]

.

[hotstreetvw]

Big engine is finished, well at least partially.  Enough to get the car down the track for the first half of this season.  I'm going to run it with the 51.5s until I pull all the EFI parts together.






Video.  Difficult to be around it without ear protection.
IMG_3926 by hotstreetvw, on Flickr

[Chip]

Very excited to see this go down the track this year. Gonna put it on a dyno before leaning on it hard?

[hotstreetvw]

I think so.  We've got far to long before actual racing starts and I'm jonesing to play around with it.  I swapped the 51s straight over from my 2275, so I need to change vents and jets.  It would be nice to get it dialed in and see what its capable of with a 48 vent.

I made a couple changes to the car this winter in preparation for this engine.  Previously, the coil was mounted inside the car and I used a through firewall deal for the coil wires.  I moved the coil to the back of the fan shroud and was able to weld up the holes in the firewall.  My plan is to mount some of those badass DIYautotune coils under the package tray on each side of the trans when I switch to EFI.  I also had the fuel pressure regulator mounted on the firewall, its now under the package tray, not as easily accessible, but gets the job done and cleans up the firewall.  All in an attempt to make a "clean" engine bay.  I also replaced the rear quarter / bumper bracket area on both sides, then removed what I needed to get the engine to slip in and out.  Added a rear apron, dzus'd on, so now I can fit a decklid and be a proper "street" car.

Here is a quick shot of the Geers 910 heads.  Soda can for reference.

Very excited to see this go down the track this year. Gonna put it on a dyno before leaning on it hard?

[hotstreetvw]

Results:
Dynojet Chassis Dyno, Finish Line Automotive & Performance in Denver

Uncorrected
203 rwhp @ 6900 rpm
166 ft-lbs @ 4900 rpm

SAE Correction based on baro pressure, temp, humidity
242 rwhp @ 6900 rpm
197 ft-lbs @ 4900 rpm

Air fuel was pretty much all over the place.  We ended up with a 185 main, 175 air and it was still leanish up top so we were not able to get real aggressive with timing.  Its @ 30 degrees.  I figure with the drive train loss, its about 285hp.

It seems like the HP peaked very early and then remained flat all the way to 8000+ rpm.  My calculations estimated it would peak at 7900 rpms. 

I think the 51.5s w/ 48 vents is choking it.  Anyone has any thoughts?  Whats the max HP you have seen through a IDA with 48 vents?

Pull #4, near peak of all the runs, one of the smoothest curves.  Seems flat?


Pull #8, peak HP, weird shit going on up top.

[hotstreetvw]

Race update.  NorthStar Dragway in Denton.  Car went 6.89@99.9mph.  Temps were high 90s, its Texas, about 3000' DA. Best 60' was a 1.4953, the car has gone a little faster with a 1.489 in New Mexico. It also made a couple 100.7mph passes but 6.9 ETs

[modnrod]

Stout.
My sports (sorta! LOL!) bike does similar numbers, but with a much slower 60ft, interesting.

[spoolin70]

Do you still have the car Mr hotstreetvw ?

Just wondering also if the big engine made it over to injection ?

Thanks
Darren

[Neil Davies]

I watched a video on YouTube the other day, with a TxVWDRA link of some description. Lo and behold, what's in the middle of the action but this bug!

[spoolin70]

Was it a fairly recent event Neil ?

This thread hasn't had an update for nearly 2 years 

[Chip]

Was it a fairly recent event Neil ?

This thread hasn't had an update for nearly 2 years 

He is pretty active on Facebook, the car is very fast! EFI within the last couple of years.

[spoolin70]

Thanks Chip but that's as far as I go then, no Facebook for me 

[Neil Davies]

Was it a fairly recent event Neil ?

This thread hasn't had an update for nearly 2 years  

Yes, within the last couple of months. I'll try to find it.

https://youtu.be/6K8m_MbGUeg

[spoolin70]

Good spot - thanks Neil

4:10 with the green door yeah

[Neil Davies]

Good spot - thanks Neil

4:10 with the green door yeah

That's the one!