3800 Gen V Pulley Size Discussion

[1998gpgt]

Anything below a 2.8” on a Gen V results in a more noticeable efficiency loss. Correct? Been a bit since I even thought about this, but that’s what I seem to remember.

My car was tuned running running a Gen V w/ a 2.8” pulley while I was still back in Illinois.

Now that I’m in Colorado, I’m barely hitting 10 PSI with the 2.8”. I was thinking about slapping on a 2.7” or 2.6” for fun, but not sure if that would even make a difference based upon efficiency loss.

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[Turbocharged400sbc]

No the whole reason you're down on Boost is because you've lost the efficiency of denser air. Being positive displacement speeding it up should counter it

you probably have to test to see if it makes a difference but I would say yeah you would gain back the Lost boost pressure... whether you would see any games I couldn't tell you without that testing

 

[1998gpgt]

No the whole reason you're down on Boost is because you've lost the efficiency of denser air. Being positive displacement speeding it up should counter it

you probably have to test to see if it makes a difference but I would say yeah you would gain back the Lost boost pressure... whether you would see any games I couldn't tell you without that testing

Haha fair enough. I’ll slap a smaller pulley on there and report back.

I didn’t realize that the density of the air was playing a part in that efficiency discussion though. So that is definitely a fun fact and changes my viewpoint a little bit.

 

[PANDA]

I ran a 2.55 or a 2.6 on my Gen V 1.9 rocker car.

I vaguely remember liking the car on the 2.8 better. Something to do with less wheel spin I think.

 

[Turbocharged400sbc]

Do you even remember that far back?

 

[m_dogg]

2.6, gen v, 1.9s 15lb of boost. Screw it, runs good ?

 

[PANDA]

2.6, gen v, 1.9s 15lb of boost. Screw it, runs good ?

It maxed out the MAP sensor and I didn't have a boost gauge. No idea how much boost it was running.

 

[m_dogg]

I like 2.6 better over 2.8. If I had 2.55 I'd slap that on haha

 

[Turbocharged400sbc]

Cody is currently Machining a 2.45 for his screw compressor

 

[PANDA]

Cody is currently Machining a 2.45 for his screw compressor

You guys should work on going 12's before you go 10's.

 

[Yaj Yak]

 

[Turbocharged400sbc]

I can't help it if Cody on his third pass of the day with four or five hours remaining left to race decided to go full retard with his nitrous stuff and push the head gasket out and then hang out for 4 hours

 

[sktchy]

You guys should work on going 12's before you go 10's.

3800 life

 

[m_dogg]

It maxed out the MAP sensor and I didn't have a boost gauge. No idea how much boost it was running.

What's the max these things read?
Turbocharged400sbc

 

[sktchy]

Map tables go to 140 kpa on the l67 and 103 on the l36 I believe so like 20.5 and 14.7 ish dependant on da? Although I think the l67 is actually a 2 bar map so closer to 30 there if it wasn't limited by a pcm designed when the Playstation 2 was hot shit

 

[Turbocharged400sbc]

Our two bar map sensors read from zero pressure to two atmospheres of pressure.
Since we live in an atmosphere at 14.7 PSI the gauge will only go up to 14.7 psi above that.

So yeah we can't really read anything over 15 psi a boost

 

[TurboTPI]

The digital boost gauge on my regal would on read up to 14.6psi.

 

[Turbocharged400sbc]

You couldn't count that high with both your shoes off

 

[GTPpower]

You guys should work on going 12's before you go 10's.

12's are boring. At least thats what all my fellow 14 seconders tell me.

 

[sktchy]

12's are boring. At least thats what all my fellow 14 seconders tell me.

I just wanna run 14s again

 

[1998gpgt]

2.6” is on. Peak boost is right around 12lbs and not even a blip of KR.

 

[Turbocharged400sbc]

Who made that belt wrap setup?

 

[1998gpgt]

Who made that belt wrap setup?

Man. It’s been so long I don’t even remember who made this version. This came off Tallman’s Regal when he demodded back in the day.

 

[Turbocharged400sbc]

Matt tallman? Shoot he made some of his own stuff so it could have very well been made by him

 

[1998gpgt]

Matt tallman? Shoot he made some of his own stuff so it could have very well been made by him

Yep!

Ron Vogel Was this one of the belt wrap kits that you made? For some reason your name is coming to mind for this.