MONTE CARLO "COPO" Monte Carlo SS - Turbosaurus Build (Swinging Dick Racing's c*ck got bent... she bounced a little too high & hard, & came down awkwardly)

[81cutlass]

I hadn't heard anything about a GT45 having some self imposed limit, but I have paid near zero attention to them so my knowledge is limited. The only limit I would say it has is if you welded the wastegate shut, but I understand where both points of view are coming from.

Reading the article how it hit a 'peak' does seem fishy. I get the setup made less power gain between 10 and 10.6 but I don't see anything on IAT, timing, or fuel, so it's tough to say 'if A then B', but again it's for short form video & print media so you can't say EVERYTHING.

Banks's 'air mouse' thing is cool, but like a lot of banks stuff he is really proud of it and seems to leave out a lot of details, not that I blame him since he has to pay his bills but.... Honestly that's the only all inclusive way I've seen to quantify the quality of air, more heat and more density might be worse than less heat and less density, and giving a single number is the best in my opinion.

If your IAT stays reasonable, the boost keeps going up, and the engine consumes fuel it's hard to argue.

Data in your hand of your setup is always better than someone else's, but someone else's is a good guideline.

 

[64nailhead]

A really neat test would be to move the IAT sensor in front of the meth to see the effect of the meth. It would provide some interesting data no doubt.

I think alot of the GT45 bad mouthing I've seen has been in the sloppy mechanics group, but only because the turbo, not the head or piping becomes the limit at a certain horsepower. But the limit isn't some ridiculously low number. FTLOG, Happel had VS racing make the 'Denmah' kit that included a GT45, Deka 80's and 450 Walbro (IIRC on the pump). And he sold the crap out of them. Then the 7875 was discovered, developed or worked out better for someone's pocketbook and the GT45 went from hero to zero overnight. Similarly the same is occurring with S480 - the new trend is towards S485/488 frame T6 away from the S480.

Give it a year and a cloned GT55 will be the rage, along with sitting on the line for 20 seconds to get to 5psi haha. Or everyone will be adding nitrous pre-turbo to light it off and blowing the hoods off from everything.

 

[motorheadmike]

I hadn't heard anything about a GT45 having some self imposed limit, but I have paid near zero attention to them so my knowledge is limited. The only limit I would say it has is if you welded the wastegate shut, but I understand where both points of view are coming from.

Reading the article how it hit a 'peak' does seem fishy. I get the setup made less power gain between 10 and 10.6 but I don't see anything on IAT, timing, or fuel, so it's tough to say 'if A then B', but again it's for short form video & print media so you can't say EVERYTHING.

Banks's 'air mouse' thing is cool, but like a lot of banks stuff he is really proud of it and seems to leave out a lot of details, not that I blame him since he has to pay his bills but.... Honestly that's the only all inclusive way I've seen to quantify the quality of air, more heat and more density might be worse than less heat and less density, and giving a single number is the best in my opinion.

If your IAT stays reasonable, the boost keeps going up, and the engine consumes fuel it's hard to argue.

Data in your hand of your setup is always better than someone else's, but someone else's is a good guideline.

Yeah, sans-wastegate would definite test the physical limitations of a lot of parts - LOL.

Here's something I have been playing with, and is by no means correct/accurate, but it is essentially an interpreted compressor map for the GT45.

Plotting Dynamic Air Flow against the Pressure Ratio (PR). The flow figure is shown in g/s (easier to read than a .000 scale). We are obviously missing a lot of critical data (like tip speed)... but, it is showing that air flow is increasing as the PR goes up. Also the PR scale is still low, which I am guessing is a function of efficiency (no where near the terminal side of its limits or that the extremes of the PR aren't relevant (calculated by taking the absolute outlet pressure (boost) and dividing by the absolute inlet pressure (baro)), and that my MAP sensor is range limited.

More on compressor maps here:

Understanding Compressor Maps – Sizing A Turbocharger

If you are into turbocharger performance, then understanding compressor maps is one of things you should know, to pick the best turbocharger for your application. Check it out here.

www.enginelabs.com

A really neat test would be to move the IAT sensor in front of the meth to see the effect of the meth. It would provide some interesting data no doubt.

I think alot of the GT45 bad mouthing I've seen has been in the sloppy mechanics group, but only because the turbo, not the head or piping becomes the limit at a certain horsepower. But the limit isn't some ridiculously low number. FTLOG, Happel had VS racing make the 'Denmah' kit that included a GT45, Deka 80's and 450 Walbro (IIRC on the pump). And he sold the crap out of them. Then the 7875 was discovered, developed or worked out better for someone's pocketbook and the GT45 went from hero to zero overnight. Similarly the same is occurring with S480 - the new trend is towards S485/488 frame T6 away from the S480.

Give it a year and a cloned GT55 will be the rage, along with sitting on the line for 20 seconds to get to 5psi haha. Or everyone will be adding nitrous pre-turbo to light it off and blowing the hoods off from everything.

It is easy enough for me to add another IAT in the intake pipe post-meth pre-compressor and/or post-compressor pre-throttle body. And there is clearly a lot of money to be made in recency bias.

 

[Northernregal]

Gale Banks sells an air mass sensor for diesel applications, I wonder if it could be scaled to run with the Holley...

This all just reminds me that I need to get my junk running

 

[motorheadmike]

Started on the rear firewall. For aluminum the rules require 0.032", I am doing 0.08". This should help stiffen the car up a touch, and reduce the potential drumming/resonance effect of thinner material.

 

[motorheadmike]

Some more progress.

 

[GroceryGetter83]

Doesn't the seat count as the firewall?

 

[64nailhead]

Some more progress.

View attachment 203152View attachment 203153

That’s very eloquent.

I much prefer to have the logo of the company that I stole the panels from in there. That way I can try for some sponsorship money.

 

[motorheadmike]

That’s very eloquent.

I much prefer to have the logo of the company that I stole the panels from in there. That way I can try for some sponsorship money.

I must be missing the joke here.

 

[Northernregal]

I must be missing the joke here.

He thinks the county is going to sponsor him for the missing speed and traffic signs.