On the Cheap SS Monte Carlo chasing a bottom end 9

64nailhead

Goat Herder
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Dec 1, 2014
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2nd hit. I wish the video was clearer, but dang I was holding on.

Again, the launching is pathetic. Converter will be in the mail on Weds lol.
 
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64nailhead

Goat Herder
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I had some moments of discouragement with snow in the forecast, but the converter is out and will be headed to Texas tomorrow.
 
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64nailhead

Goat Herder
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The last piece for an 8.50 certification showed up yesterday.
678C36D2-1DA5-4195-9998-E245A8EDAFFB.jpeg


Chassis certifications appointment is 5/14. I’m reading the rule book to confirm I have every thing ready, but I assume the worst lol.

Something will be wrong -
Hope not !!!!
 
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wingnutks

Master Mechanic
Feb 15, 2016
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I made it to the no-prep race. The bad was the race organizer has zero organizational skills, so you can understand how I made two runs only. The good, 80 degrees and a full day of race cars.

I made two hits (that's it), but that was enough to make me smile and know what I have. 1st hit was on WG spring only and it made 12psi. I believe I've turned the world's worst hotside into something mediocre. I have a 5lb spring in the gate, so it's still not great, but it's good enough for me to dial it in FOREVER. Remember my old hotside system with a 4-5lb spring made 18 and that led to a somewhat out of control launch ramp. Previously I had a 44mm china gate and I've stepped up to 60mm china gate - both VS Racing stuff. On the 2nd hit I made 25 psi and holy sheetz I broke the tire free at the top of 1st and 2nd gear. And actually had to dump the 2nd run due to being somewhat sideways at about 100mph. But I'll get that tamed.

Regarding the 25 psi, with the old turbo and hotside I was putting 35lbs of CO2 on top of the WG to get to 27psi, so I assumed that 18lbs of CO2 would yield something in the range of 18-20 AND I WAS WRONG lol. A more efficient turbo (larger) and more efficient hotside appears to have made my CO2/dome pressure system more efficient as well - at least I believe.

When I got the car to run it's fastest with previous setup I was using about 710lbs of fuel/hr - that was at 24psi of boost. Yesterday when it hit 25 psi I was 970lbs of fuel/hr. Without getting into the math, I'm pretty sure that should equate into approximately another 200-250hp. I can only wager guesses at what it's making, but based on the assumption that my previous turbo was supposed to tap out at 900hp I'll guess that I'm at 1000+ crank hp. Without a time slip or trap speed though, I really have no good idea other than guesses.

Another extreme positive was that it appears that my towering inferno of intake temps is now under control. I turned the meth down to virtually nothing and they stayed below 170 which is more than manageable imo. Also, the giant trans cooler kept the transmission temp well below 170 as well - they used to be another 15-30 higher.


Now for something that didn't work out too well. The new converter missed the mark by a crap ton. I cannot get it to stall beyond 3150, which made for some insanely slow motion launches. I was letting go at 1-2 psi and the rpm's were waaaaay too low. I was expecting it stall to 4000 and it missed that mark by 30%. I've already spoken to the converter guy via messenger and am awaiting a call back. I'm hoping he can re-work this one as I don't want to drop the big dollar on a another.

All in all, it was great day afaic. The thing stuck together at 25 psi, nothing leaked or broke.


I'll attach a couple of poor quality videos later tonight.
You on e85? My buddy and the guys at Fueltech said that it usually works out to 1:1 for crank HP per lb/hr on E85 with boost. I just started my tuning but I did make one hit which made 9.5psi at 48% tps, to 5900 rpm and it wanted right around 830lb/h of fuel at E78, maybe a touch more to get the AFR a bit richer. On the dyno the motor made 842hp to the crank at 11psi at 6700rpm... so it seems pretty close. Id bet I am making closer to 780-800 at 9psi at 5900rpm, but I also am using fuel to drive the blower that never makes it to the crank. Dyno was 11psi non-intercooled and now its 9.5psi intercooled at about 85F.
 
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64nailhead

Goat Herder
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You on e85? My buddy and the guys at Fueltech said that it usually works out to 1:1 for crank HP per lb/hr on E85 with boost. I just started my tuning but I did make one hit which made 9.5psi at 48% tps, to 5900 rpm and it wanted right around 830lb/h of fuel at E78, maybe a touch more to get the AFR a bit richer. On the dyno the motor made 842hp to the crank at 11psi at 6700rpm... so it seems pretty close. Id bet I am making closer to 780-800 at 9psi at 5900rpm, but I also am using fuel to drive the blower that never makes it to the crank. Dyno was 11psi non-intercooled and now its 9.5psi intercooled at about 85F.
Yes, E85. Actually E80 according to my sensor and my testing equipment. Your calcs sound reasonable. I'm using the lbs/hr as more of comparison. I managed a 9 at 710lbs/hr. So at 980 I should be ............ bench racing in my head. I'm guessing close to 1000. Maybe more, maybe less. It's a conversation piece presently lol.


I'm more stressed about getting it to pass the chassis cert presently. I'm really hoping to not be one and done racing because of getting kicked out.

How much can your blower make before it turns into heat only? Can you run 15-18?
 
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wingnutks

Master Mechanic
Feb 15, 2016
352
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Yes, E85. Actually E80 according to my sensor and my testing equipment. Your calcs sound reasonable. I'm using the lbs/hr as more of comparison. I managed a 9 at 710lbs/hr. So at 980 I should be ............ bench racing in my head. I'm guessing close to 1000. Maybe more, maybe less. It's a conversation piece presently lol.


I'm more stressed about getting it to pass the chassis cert presently. I'm really hoping to not be one and done racing because of getting kicked out.

How much can your blower make before it turns into heat only? Can you run 15-18?
I am not sure on the blower. I have only made a couple pulls slowly getting into it and the pully that used to make 12-13psi at 6000 rpm only made 9.5psi on this set up. I am wondering that even though the BOV is fully closed, I wonder if the TB only being open 50% is basically becoming a slight boost restriction. So basically on the charge pipe side I am making 12psi, but only showing 9.5 in the manifold? Next time I get the car out I am going to make sure I get to WOT to see what happens. One thing going "against" me, is being intercooled now, all things being equal it should make less than 16-17psi it used to make non-intercooled just because the change in inlet temps. However, I am sure the 92mm TB flows way more than the Holley 750 with annular boosters, so I might see a bit more boost in the intake if the 750 carb was a restriction. As of now I am spinning the blower as fast as recommended, in fact slightly over max speed, so unless I have a boost leak with all my stupid piping/intercoolers, its making as much as it will make.
 

81cutlass

Comic Book Super Hero
Feb 16, 2009
3,953
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Western MN
Have you gave the new anti-roll bar a good testing? Chassis seem to be working better now?
 

64nailhead

Goat Herder
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Dec 1, 2014
4,302
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Upstate NY
I am not sure on the blower. I have only made a couple pulls slowly getting into it and the pully that used to make 12-13psi at 6000 rpm only made 9.5psi on this set up. I am wondering that even though the BOV is fully closed, I wonder if the TB only being open 50% is basically becoming a slight boost restriction. So basically on the charge pipe side I am making 12psi, but only showing 9.5 in the manifold? Next time I get the car out I am going to make sure I get to WOT to see what happens. One thing going "against" me, is being intercooled now, all things being equal it should make less than 16-17psi it used to make non-intercooled just because the change in inlet temps. However, I am sure the 92mm TB flows way more than the Holley 750 with annular boosters, so I might see a bit more boost in the intake if the 750 carb was a restriction. As of now I am spinning the blower as fast as recommended, in fact slightly over max speed, so unless I have a boost leak with all my stupid piping/intercoolers, its making as much as it will make.
I put in a pre-intercooler sensor over the winter and my low budget china junk 31"x12"x4" is eating up about 5 psi at 25psi in the manifold and 3psi at 12 psi in the intake.

Regarding your setup, you're going to have to tune for the cold intake temps. That's going to be the advantage. Also it seems that it should be much more street friendly. At least that's what I'd assume.
 
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64nailhead

Goat Herder
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Dec 1, 2014
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Have you gave the new anti-roll bar a good testing? Chassis seem to be working better now?
Yes. But the true test will be on a sticky track. It didn't hit hard enough on the no prep track to tell, but down the track it seemed to not twist up. I didn't have to test my driving ability until it broke free at the top of 2nd gear. Where I was having to drive it (steer) down the track previously. I always assumed that was the twist, but I could be wrong about that too. I didn't touch the shocks either. I left them at the street settings - 2 and 6..

Holley has a boost by gear strategy that I'm going to have to use on unprepped tracks if I keep running 20+lbs.

I think I can get to my goal easily if I can get the chassis working. I just need the converter to work and some track time.

And then add some nitrous :)
 
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64nailhead

Goat Herder
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Dec 1, 2014
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Upstate NY
Balancer is installed and all of the front clip/cooling parts.

Bought this seat support. It’s pretty neat. Getting the bolts into the back of the factory seat turned bloody for a finger - Geesh that sucked. The rest went pretty well. The seat is now rock solid when hooked up. I never realized how much give there was in it until there wasn’t any lol.
 

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