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Thu Apr 03, 2008 2:38 pm

Quote: Why would you say that?
As with anything, key is to know how to tune a motor.

I just received my original Dragster motor back for a "freshen up" after 6 years of racing abuse. Its beautiful inside. It leaked down 4% on the worst cylinder, bearings are fine, cam and lifters are perfect, and even the MAG case is fine.
This motor has a TON of runs on it and has pushed my LGK dragster to a 8.51 ET way back when exactly how it is now. NOTHING has been changed or done to it except the oil.
The motor has been in a Super Comp car and has gone as fast as 10.09 at 12 pounds of boost.
Guess what compression it has?????? 9.3 - 1
_________________
Marty

well ill be darned...that eased my mind a whole lot! lol thanks marty, i know that tuning is a REALLY big part of a turbo motor and im not gonna skimp on anything when it comes to that.

Thu Apr 03, 2008 5:33 pm

All I was saying was I had used the search function and read every post he made in the feedback forum and he never had a problem with AJ. all he did was chip in on complaints that people made. what bothers me is when someone says ‘hey, I just bought this stuff from a friend’ and someone else says ‘you just bought crap’ (not a direct quote), basing that statement on something he read on the internet... I'll be done complaining. don't mean to jack a thread. sorry, I was in a bad mood at the time. :roll:

Thu Apr 03, 2008 5:47 pm

its ok man, it happens.... 8)

Thu Apr 03, 2008 5:50 pm

Marty Staggs wrote: Why would you say that?
The motor has been in a Super Comp car and has gone as fast as 10.09 at 12 pounds of boost.
Guess what compression it has?????? 9.3 - 1

Marty

But what fuel are you running, Marty?

Thu Apr 03, 2008 5:51 pm

Quote: Best way to find out is to run it and just see what happens. Dont know till ya tried, right

heck yeah man thats what im fixin to do![/code]

Thu Apr 03, 2008 5:52 pm

???? what is that for miniman ???

Thu Apr 03, 2008 10:22 pm

vwairheads wrote: VwBuM71 wrote: Quote: The 8.5 motor will actually have more torque and pull harder.

thats really good to know :lol: now im not worried as much haha

but it wont last..... :lol:

I ran 8:1 compression ratio with my old turbo 1776 for three years, and it was my daily driver. I could get away with about 9 PSI on pump gas, and sometimes ran it with 17PSI and 110 gas. Ran great! I am now running a 1915 with 7.7:1 compression ratio, with 11 pounds with no detonation. I have a MSD6BTM which retards the timing when it senses boost, so 24 degrees of timing at 11PSI. I'd highly recommend the MSD or something similar with your turbo engine.

Thu Apr 03, 2008 10:42 pm

VwBuM71 wrote: ???? what is that for miniman ???

If he responds, we'll find out...
A turbo race engine compared to a street turbo is apples and oranges.

Thu Apr 03, 2008 11:28 pm

VwBuM71 wrote: Quote: but it wont last.....

it aint gonna be my daily driver, im only runnin it at the track, MAYBE around town to locl shows and what not...so dependability is not a necessity here lol

Read his post

Thu Apr 03, 2008 11:29 pm

miniman82 wrote: Marty Staggs wrote: Why would you say that?
The motor has been in a Super Comp car and has gone as fast as 10.09 at 12 pounds of boost.
Guess what compression it has?????? 9.3 - 1

Marty

But what fuel are you running, Marty?
C-16

Fri Apr 04, 2008 6:58 am

Marty Staggs wrote: miniman82 wrote: Marty Staggs wrote: Why would you say that?
The motor has been in a Super Comp car and has gone as fast as 10.09 at 12 pounds of boost.
Guess what compression it has?????? 9.3 - 1

Marty

But what fuel are you running, Marty?
C-16

My point exactly. A race car running C-16, and 9.3:1 @ 12lbs is a completely different animal than a street car trying to do the same thing on pump gas (I assume 91 RON). VwBuM71, do you plan on using race gas, or pump gas? These are all thing we need to know before giving advice, because one way you might get away with it, the other might leave you with scattered engine bits. :wink:

Fri Apr 04, 2008 7:44 am

i understand your point now miniman, i plan on using pump gas for the most part...in florida we pump 93 not 91, lol not that it makes that big of a difference, but...oh well. but to clarify it all, i plan on running pump gas.

Fri Apr 04, 2008 8:29 am

OK, then I would try and get the compression a little lower, unless you have a form of detonation control (water injection, ect). It might be OK if you only run 7~8lbs, which is what most wastegates are set to. However, if you plan to go any higher (most people do after getting their feet wet :wink: ), I would drop your C/R a tad just to be on the safe side. CB sells Copperhead gaskets; you could use those.

Just plugging in some generic numbers in CB's calculator for an 1835 with your compression, I come up with .040 deck, and 55cc chambers. If you put a .040" Copperhead in there, your C/R drops to 7.7:1, which sounds a little better for a turbo. Just an example, but gives you something to think about.

Fri Apr 04, 2008 8:41 am

Again, I will try to pass on some knowledge -

Two motors - identical except the compression.

#1 motor - 8.5 - 1 runs 7 pounds of boost on PUMP GAS.
#2 motor - 7.5 - 1 and runs 10 pounds of boost on PUMP GAS.

Motor #1 runs better, has more power down low, is nicer to drive and makes more torque.

Of course the numbers are examples and you may be able to go even further before detonation based on cam, heads, fueling and timing control.

Fri Apr 04, 2008 8:43 am

My examples of higher compression race motors are simply to demonstrate that even in "extreme" applications, it still works. I am the only person dumb enough to try it as the rest of the VW world is a bunch of lemmings and spout off crap that they heard from a freind, saw written somewhere, and so and so. If you dont try something different once in a while, you run the same and no better than anyone else.

Fri Apr 04, 2008 8:49 am

stop BSing, that's impossible!

John
Aircooled.Net Inc.

Marty Staggs wrote: vwairheads wrote: VwBuM71 wrote: Quote: The 8.5 motor will actually have more torque and pull harder.

thats really good to know :lol: now im not worried as much haha

but it wont last..... :lol:
Why would you say that?
As with anything, key is to know how to tune a motor. :wink:

I just received my original Dragster motor back for a "freshen up" after 6 years of racing abuse. Its beautiful inside. It leaked down 4% on the worst cylinder, bearings are fine, cam and lifters are perfect, and even the MAG case is fine.
This motor has a TON of runs on it and has pushed my LGK dragster to a 8.51 ET way back when exactly how it is now. NOTHING has been changed or done to it except the oil.
The motor has been in a Super Comp car and has gone as fast as 10.09 at 12 pounds of boost.
Guess what compression it has?????? 9.3 - 1 :oops:

Fri Apr 04, 2008 9:07 am

john@aircooled.net wrote: stop BSing, that's impossible!

John
Aircooled.Net Inc.

Marty Staggs wrote: vwairheads wrote: VwBuM71 wrote: Quote: The 8.5 motor will actually have more torque and pull harder.

thats really good to know :lol: now im not worried as much haha

but it wont last..... :lol:
Why would you say that?
As with anything, key is to know how to tune a motor. :wink:

I just received my original Dragster motor back for a "freshen up" after 6 years of racing abuse. Its beautiful inside. It leaked down 4% on the worst cylinder, bearings are fine, cam and lifters are perfect, and even the MAG case is fine.
This motor has a TON of runs on it and has pushed my LGK dragster to a 8.51 ET way back when exactly how it is now. NOTHING has been changed or done to it except the oil.
The motor has been in a Super Comp car and has gone as fast as 10.09 at 12 pounds of boost.
Guess what compression it has?????? 9.3 - 1 :oops:

Call me Houdini :lol:

Fri Apr 04, 2008 9:20 am

Marty. When you say 7lb of boost, is that gage or total ATM? And you are talking short runs. Yes?

Fri Apr 04, 2008 9:37 am

Jimmy111 wrote: Marty. When you say 7lb of boost, is that gage or total ATM? And you are talking short runs. Yes?
Guage and while driving ON THE STREET or highway.
I have done it.

Fri Apr 04, 2008 9:40 am

Marty Staggs wrote: Jimmy111 wrote: Marty. When you say 7lb of boost, is that gage or total ATM? And you are talking short runs. Yes?
Guage and while driving ON THE STREET or highway.
I have done it.

Hows that twin turbo 3 liter runnin?