increase mph

[H/OtoGN]

How do you tune to increase mph? More Boost,timing and fuel?

[1970gsx]

Yep!

[turbo2nr]

More tire pressure in the front. Lower the car a little.

Try manually shifting a little higher in the RPM range for the 2-3.

Get a bigger turbine housing/or complete turbo

Get a bigger DP

[Madboost]

Ahhh the Turbine housing

All of the above will increase mph, as well as lower E.T.

Now the turbine housing is one part that will increase lag but give the car a much better top end pull. If you can spool it a bigger exhaust housing will always help mph.

I know of two people in MAGNA that can vouch for the gains of the PTE .85 exhaust housing.

[H/OtoGN]

Originally Posted by Madboost

Ahhh the Turbine housing

All of the above will increase mph, as well as E.T.

Now the turbine housing is one part that will increase lag but give the car a much better top end pull. If you can spool it a bigger exhaust housing will always help mph.

I know of two people in MAGNA that can vouch for the gains of the PTE .85 exhaust housing.

Did you mean all of the above will increase speed and lower e.t?

[pacecarta]

mph at traps is an indicator of hp
so if you make a few passes and then make changes to boost , timing or fuel and mph goes up youve gained HP , keep fiddling and when mph doesnt go up and no kr then your where your car is making peak hp for that boost , now add boost adn fuel and try again , do this till you cant (or wont) run anymore boost
once the boost is as far as you feel like going then try timing

adding boost without proper fuel or octane may result in slower mph and broken parts
adding octane (ie race fuel ) and not increasing timing is a waste of fuel and you may run slower

you need to run boost and timing according to what the fuel type you choose and always tune for no knock

then by adjusting fuel and timing either up or down look for what your car likes by watching for increase or decrease in trap speed (hp) , a rich car generally will be slower than a well tuned car with just enough fuel ,

timing if upped within limits of what your fuel choice can support with no kr can increase hp and thus mph

lets say you choose to run 93 , typicall youll need to run low timing and low boost say 19/17 timing and maybe 17psi if its cool out

add a bigger intercooler and you may be able to get away with more boost
add alky or race gas and the timing and boost can be brought up as can boost ,
where your hp limit is will be be determined by your combo , your comfort level and getting it to the extremes without knock .

once your car can run cleanly through the traps and mph to its best then work on getting the bottom sorted out and try for lower 60' (traction)

with some good gas (100UL) you should have no problems reaching high 11s at 112+ if you can get traction and a decent 60'

btw ive always run the 82 housing and its nice but you may need a little help prespooling off the line if on stock converter , with a 2800 stall the bigger exhaust housing is not noticable as spoolup is instant

[gnetic86]

I always thought you just push the gas pedal harder for more mph?

[84BuickGNYorkPA]

Originally Posted by pacecarta

mph at traps is an indicator of hp
so if you make a few passes and then make changes to boost , timing or fuel and mph goes up youve gained HP , keep fiddling and when mph doesnt go up and no kr then your where your car is making peak hp for that boost , now add boost adn fuel and try again , do this till you cant (or wont) run anymore boost
once the boost is as far as you feel like going then try timing

adding boost without proper fuel or octane may result in slower mph and broken parts
adding octane (ie race fuel ) and not increasing timing is a waste of fuel and you may run slower

you need to run boost and timing according to what the fuel type you choose and always tune for no knock

then by adjusting fuel and timing either up or down look for what your car likes by watching for increase or decrease in trap speed (hp) , a rich car generally will be slower than a well tuned car with just enough fuel ,

timing if upped within limits of what your fuel choice can support with no kr can increase hp and thus mph

lets say you choose to run 93 , typicall youll need to run low timing and low boost say 19/17 timing and maybe 17psi if its cool out

add a bigger intercooler and you may be able to get away with more boost
add alky or race gas and the timing and boost can be brought up as can boost ,
where your hp limit is will be be determined by your combo , your comfort level and getting it to the extremes without knock .

once your car can run cleanly through the traps and mph to its best then work on getting the bottom sorted out and try for lower 60' (traction)

with some good gas (100UL) you should have no problems reaching high 11s at 112+ if you can get traction and a decent 60'

btw ive always run the 82 housing and its nice but you may need a little help prespooling off the line if on stock converter , with a 2800 stall the bigger exhaust housing is not noticable as spoolup is instant

Thanks Paul,

I just had to print that out for a reminder on race day, nice and clearly written. Thanks again, you are the master wrencher!

Chuck

[J Banning]

Originally Posted by Madboost

Ahhh the Turbine housing

All of the above will increase mph, as well as lower E.T.

Now the turbine housing is one part that will increase lag but give the car a much better top end pull. If you can spool it a bigger exhaust housing will always help mph.

I know of two people in MAGNA that can vouch for the gains of the PTE .85 exhaust housing.

Oh yeah... the .85 PTE exhaust housing!

-Banning.

[wdunfee]

Pauls statement should be made a sticky.. If only there were more of him to spread around..

[gnetic86]

Thats the kinda stuff we should post on Magna's website or somethin. Not that I really want another username/password but it'd be cool to have a club tech-info section! Use MediaWiki or something to organize it and have it available to Magna only...or hell who cares just send it to Gnttype.org

One thing I always thought was missing from gnttype.org (and something I thought I suggested to them but never got a response) was a troubleshooting type of chart where you could have "problem --> solution". People could post or send them symptoms and ultimately what the fix was. I got the idea from an IT site called "EventID.com"...where you can look up Windows event codes and people post possible (or proper) causes and fixes for them.

Anyway didn't mean to jack the thread!

[pacecarta]

o good guidline for tuning can be found on razors forum on tb.com tuning with alky since the principles still apply

http://www.turbobuick.com/forums/alc...ntrol-kit.html


another good read is on steve woods site
http://www.vortexbuicks-etc.com/TuningBasics.htm

now if you want a rough guidline for amount of timimg to start with for the octane you may run just look at the options for the extender chips on mikes site
http://www.fullthrottlespeed.com/ite...IP~eq~~Tp~.htm

Octane (WOT spark advance degrees: low gear/high gear)
1 - 91 (17/15)
2 - 92 (18/16)
3 - 93 (19/17)
4 - 96 (21/19)
5 - 98 (23/21) <---- Translator Plus, Alcohol Injection
6 - 104(25/23)
7 - 108(27/25)
8 - 108+(29/27)

as for how much boost you can run , intercoolers and alky as well as outside temps will have some effect on what you can run that day and most chips will have a recommended boost level on it and there should be enough fuel commanded to cover boost for whats on the chip , you can always try for a little more boost by watching o2s and knock and adding fuel if needed but if injectors are small and are already at 100% you cant add more in chip and only other way is increase base fuel pressure (oldschool) and thats a dangerous game to play unless you are really watching (recording) the O2s ,(btw if your over 80% on injector duty its time for bigger injectors!!) and realize the pressure limits of your pump (boost +base so if you run 25# boost and 45 base FP then thats already about the limit of most healthy 340 pumps, 70psi , and understand as pressure goes up volume available from pump goes down so there are limits to boost since you need fuel not just octane or cold inlet air