When to the track with the old holset and had some fun. First run I spun through 1st and 2nd and netted a 16.8 haha. Then I lowered my street tire pressure to 25 and ran a 12.9, then 12.1 at 118. Still spinning! So finally the did some prep and I managed a 11.96 at 122.4. witha 1.8 60 foot.

Is that a decent trap speed? all mods and details are in profile.

Do you have a video of this run?

Better have some vids! I wana see .

yabro i would lov to see a video also

It's a decent trap speed for a high 11 second car sure. How many lbs. of boost where you running on that pass? AFR? Race fuel or pump gas?

Nice, i thought i recognized the name. Give us a log and some more info man.
I have a bolton 7 blade with internal gate, is yours internal or external, how much boost?

I tried to post up the 1/4 thing in the profile but it ddn't work ill try again. But I ran a 11.96 at 122.4 at the 1/4. 7.78 at 96.8 in the 8th with a 1.85 60' foot. My 12.1 runs I had 1.7 60's but this was my first time ever launching at the track so I am hapy for now, but I have the 4 spyder diff for a reason and am shooting for a 1.6 60' foot.

I was on e85 at 29-30psi. 19 degrees of peak timing with a safe 11.2 a/f. Safe timing too, I just was happy with the car and stopped, I never had to pull timing because I went too far. I am wondering what a set of 272s and some more timing will do. I don't have a video since I was alone but I am working on bringing a buddy to film it. The turbo is internally gated. I am going to lower the tire pressure to 22psi and hope that it hooks. But thats about as low as I can go, the inside of the tire will loose contact.

Good numbers for the first time out!
Definitely could drop some time with some practice and a 1.6-7 60' time
I would say you would benefit greatly from the 272 cams as well!

It was 68-70 degrees out and cloudy. I was told street tires don't like vht, and will accually make it spin becasue its so smooth and my tires are cold. So I am trying to figure out traction and a little 60' foot ajustment and who knows. All stock long block too minus head studs.

Where did you run? Byron, Cordova, or GLD? Thats good mph too!

Byron. It is litterally 5 minutes away. I should go more often but I didn't when I knew the car was in the 13s. I think more timing is needed. Im looking to see what people are seeing for peak with similar set ups. this was a very safe tune on the car, with enough to make you smile.

95burgundyesi said:

Byron. It is litterally 5 minutes away.
I think more timing is needed.

Click to expand...

I'm about 15mins from RT66 Joliet, but there tech is not as friendly! I would rather go to byron or US41 Indiana(which is pretty far from you)

Obviously increasing the timing is something you can try to see if your car likes it. You are running some pretty conservative A/F for E85. You may want to add a degree or two and see how the car responds. It will most likely be a good response. Check your A/F and if they are still low 11s, then maybe take a little fuel out as well.

Vid?

No one was there to hold a camera so no videos of TRACK action

This is on the 8 blade HX35 in a bolt on housing? Stock cams and intake manifold? How many lbs/min are you flowing calibrated? How much did your airflow increase with the addition of the FP2 cams (in your profile). I would imagine you are probably at the end of your compressor range.


Great trap speed. 122 in a full weight 2g is a 450 hp car easily. Sounds like you need some drag radials now and some practise. Good luck.

What did the rest of the timeslip look like?

Good times! I was told you were running consistant low 11's trapping high 120's? I believe it was david from tracreations....

This is on a bolt on BEP housing with an 8 blade hx35. Rated at 52lbs/min. according to the holset thread. Before the cams, I was flowing 42lbs/min. No idea what the air gain was with fp2s in. I put the car away 2 weeks later. But the car pulled much harder from 5750-8k I want to say.

I am a retard and can not read a compressor map, and have asked but I never got a response

I also created a thread that specifically asked where does the hx35 stop making power, and just hot air and I never got an answer to that one. So I am keeping the hx35 and with more fuel going for tens with some traction miracles. I am ditching the 2gb 17s and going for evo rims on some nittos this winter.

The car squats like a stripper trying to pick up dollars with her butt checks, I am planning on koni/GC springs or some 700/350 springs to help, yet keeping the car handle friendly. I like turns.

Timeslip link is in profile. But Ill say it here-
R/T-.294
60'-1.850
330-5.147
1/8-7.788
MPH-9.68
1000-10.74
1/4-11.966
MPH-122.47

That was david's guess. I was told I would pick up some trap mph and with that trap and some traction low elevens would come. I was on 1000s and running out of fuel so 30psi was my limit.

I am tempted to build the block this winter but I have decided to just keep the block how it is and hit 10.8 on stock bottom end, and spend the thousand I save on suspension and 1600cc. and a few other goodies ex: a real second fan and better MBC. I was told standard arps will stretch after 35psi so I have been debating on L19 studs, but at that point I will want to just do the bottom end. So idk.

95burgundyesi said:

This is on a bolt on BEP housing with an 8 blade hx35. Rated at 52lbs/min. according to the holset thread. Before the cams, I was flowing 42lbs/min. No idea what the air gain was with fp2s in. I put the car away 2 weeks later. But the car pulled much harder from 5750-8k I want to say.

I am a retard and can not read a compressor map, and have asked but I never got a response

I also created a thread that specifically asked where does the hx35 stop making power, and just hot air and I never got an answer to that one. So I am keeping the hx35 and with more fuel going for tens with some traction miracles. I am ditching the 2gb 17s and going for evo rims on some nittos this winter.

The car squats like a stripper trying to pick up dollars with her butt checks, I am planning on koni/GC springs or some 700/350 springs to help, yet keeping the car handle friendly. I like turns.

Timeslip link is in profile. But Ill say it here-
R/T-.294
60'-1.850
330-5.147
1/8-7.788
MPH-9.68
1000-10.74
1/4-11.966
MPH-122.47

That was david's guess. I was told I would pick up some trap mph and with that trap and some traction low elevens would come. I was on 1000s and running out of fuel so 30psi was my limit.

I am tempted to build the block this winter but I have decided to just keep the block how it is and hit 10.8 on stock bottom end, and spend the thousand I save on suspension and 1600cc. and a few other goodies ex: a real second fan and better MBC. I was told standard arps will stretch after 35psi so I have been debating on L19 studs, but at that point I will want to just do the bottom end. So idk.

Click to expand...

You got your answer already

Adn it's based off the compressor map. Not speculation. Here's the map and I put in the lines for you to see. It actually flows more like 54lb/min before going below 60% efficiency (based on 85*F intake temp and about 500ft elevation or 14.425psia). But there's nothing wrong with being conservative.

A compressor flows below 60% efficiency though. So where it stops making power is subjective to your build and tune. The flow is highest before falling below 60% at 3.05PR or right at 30psi (assuming the same 14.425psia as reference). So planning on 30psi of boost and doing other mods to help her reach 54lb/min would optimize the compressor to the setup. This would mean getting cams, possibly a smim and/or exhaust mani upgrade. But that's just to insure the compressor isnt spinning at a higher rpm than the highest on the map. As you can see by the 60% curve, the compressor is still as efficient at a higher boost and higher flow, but just at an rpm beyond the map.

54lb/min: It's a 500whp turbo.

95burgundyesi said:

This is on a bolt on BEP housing with an 8 blade hx35. Rated at 52lbs/min. according to the holset thread. Before the cams, I was flowing 42lbs/min. No idea what the air gain was with fp2s in. I put the car away 2 weeks later. But the car pulled much harder from 5750-8k I want to say.

Click to expand...

Theres no possible way you were flowing 42 lbs/min and trapping 122 in a full weight 2g. I also don't see you only flowing 42 lbs/min at 30 psi on that turbo. I think its safe to say you were probably in the 48 lbs/min range. You sure you're maf was calibrated correctly? Boostest and actual boost lined up all the way up to 100% gm/rev?

Do you have any logs of the tune you had on the car?

I don't have the laptop with me, but I can check it out. With fp2 cams at 30psi I was flowing 46-47lbs/min.

I got 7lbs of air left. Ugh I don't think the 2gpiston 1g rod will hold together at 500whp for long, but I am going to try

1g rods? sure would. If you have a spot on tune, they can handle 600whp not just 500whp. Same with the 2g pistons.

Haha well my tune doesn't knock but I wouldn't say it's spot on, I just add timing and play with fuel. I'm no pro. If it ain't broke don't fix it. I guess I could pay for a professional tune, but then it isn't my creation.

lookin good man. hope you can get some better times soon.

If winter would just end already!