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SolaraGuy.com • View topic - 7 psi belt length...+methanol
For those looking for more speed through force. Forced Induction; Supercharger,Turbocharger or Nitrous discussion and maintenance.

7 psi belt length...+methanol

Re: 7 psi belt length...+methanol

Postby ToyoSolV6 » Thu May 12, 2011 4:51 pm

lol gregs car is slow those numbers are bs lol, the belt on my car is a gatorback belt a lot of ppl say these belts suck. Ive been lucky enough to where the belt is still really good after a yr of going 5.5 psi.
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Re: 7 psi belt length...+methanol

Postby Gregtrd » Thu May 12, 2011 7:46 pm

if you lived in cali your solara would of already seen 300+whp.
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Re: 7 psi belt length...+methanol

Postby SirThomas88 » Fri May 13, 2011 9:40 pm

hskrsolara wrote:Hey guys,
So, I finally talked myself out of parting out the solara...and instead am installing a 6.5 lb pulley and my methanol kit. Just curious what belt you guys are running for belts on 7 psi? I figured that would be close enough to 6.5 psi to keep it nice and snug on the SC. I am getting some slippage now, on my 5.5 pulley so I want to eliminate that for the future. I have the automatic tensioner...should I replace that too? It seems really easy to pull the belt up, like the tensioner isnt maintaining strong deflection.

Also, what is the consensus on the nozzle size and location for the Methanol folks? There seems to be quite a range of info on that side...hoping this will finally get me to the 300 whp mark. Thanks!


I use a 225ml nozzle with my 5.5 pulley. Everyone will tell you that's the equivalent of spitting into the engine. I can't argue against that, but what I will tell you, is it's enough to feel a difference in power. It's enough to lower my AFR by over 1 point. I know this because I had my car tuned to 11.9:1 and when I ran out of meth I would run around 13.3:1. So 225ml definitely does SOMETHING. After talking to Greg, I plan to bump up my meth to 450ml. Not as high as Greg recommends, but high enough for me.

As far as location for the tank, put it anywhere in your engine bay that makes sense and where you have room. I put my little half gallon tank attached to the inside of my front bumper bar. I drilled four holes and ran zip ties through them and the tank to secure it.

crispone wrote:HA HA! How come every time someone decides NOT to part-out/sell their vehicle, it means dropping a CHUNK OF CHANGE into it again???!!! :o

G/L with the adds! :wink:

-crisp :evilbat:


Nozzle, pulley, and belt doesn't add up to too much lol.
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Re: 7 psi belt length...+methanol

Postby 20SoLaRa02 » Sat May 14, 2011 2:55 pm

Has anybody installed the nozzles into the stock intake? or is everyone running an aftermarket intake system?

Also what size nozzles does the stage 2 MAF kit come with?

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Re: 7 psi belt length...+methanol

Postby hskrsolara » Sat May 14, 2011 3:25 pm

they will ask you what size nozzles you want, if you go with the Snow kit. they are very helpful and will be able to give you advice on which way to go.
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Re: 7 psi belt length...+methanol

Postby hskrsolara » Sat May 14, 2011 3:26 pm

SirThomas88 wrote:
hskrsolara wrote:Hey guys,
So, I finally talked myself out of parting out the solara...and instead am installing a 6.5 lb pulley and my methanol kit. Just curious what belt you guys are running for belts on 7 psi? I figured that would be close enough to 6.5 psi to keep it nice and snug on the SC. I am getting some slippage now, on my 5.5 pulley so I want to eliminate that for the future. I have the automatic tensioner...should I replace that too? It seems really easy to pull the belt up, like the tensioner isnt maintaining strong deflection.

Also, what is the consensus on the nozzle size and location for the Methanol folks? There seems to be quite a range of info on that side...hoping this will finally get me to the 300 whp mark. Thanks!


I use a 225ml nozzle with my 5.5 pulley. Everyone will tell you that's the equivalent of spitting into the engine. I can't argue against that, but what I will tell you, is it's enough to feel a difference in power. It's enough to lower my AFR by over 1 point. I know this because I had my car tuned to 11.9:1 and when I ran out of meth I would run around 13.3:1. So 225ml definitely does SOMETHING. After talking to Greg, I plan to bump up my meth to 450ml. Not as high as Greg recommends, but high enough for me.

As far as location for the tank, put it anywhere in your engine bay that makes sense and where you have room. I put my little half gallon tank attached to the inside of my front bumper bar. I drilled four holes and ran zip ties through them and the tank to secure it.

crispone wrote:HA HA! How come every time someone decides NOT to part-out/sell their vehicle, it means dropping a CHUNK OF CHANGE into it again???!!! :o

G/L with the adds! :wink:

-crisp :evilbat:


Nozzle, pulley, and belt doesn't add up to too much lol.


yeah all those parts were already in the garage...but the change comes into play when I go back to the dyno...$$$.
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Re: 7 psi belt length...+methanol

Postby crispone » Sat May 14, 2011 5:40 pm

hskrsolara wrote:
SirThomas88 wrote:
hskrsolara wrote:Hey guys,
So, I finally talked myself out of parting out the solara...and instead am installing a 6.5 lb pulley and my methanol kit. Just curious what belt you guys are running for belts on 7 psi? I figured that would be close enough to 6.5 psi to keep it nice and snug on the SC. I am getting some slippage now, on my 5.5 pulley so I want to eliminate that for the future. I have the automatic tensioner...should I replace that too? It seems really easy to pull the belt up, like the tensioner isnt maintaining strong deflection.

Also, what is the consensus on the nozzle size and location for the Methanol folks? There seems to be quite a range of info on that side...hoping this will finally get me to the 300 whp mark. Thanks!


I use a 225ml nozzle with my 5.5 pulley. Everyone will tell you that's the equivalent of spitting into the engine. I can't argue against that, but what I will tell you, is it's enough to feel a difference in power. It's enough to lower my AFR by over 1 point. I know this because I had my car tuned to 11.9:1 and when I ran out of meth I would run around 13.3:1. So 225ml definitely does SOMETHING. After talking to Greg, I plan to bump up my meth to 450ml. Not as high as Greg recommends, but high enough for me.

As far as location for the tank, put it anywhere in your engine bay that makes sense and where you have room. I put my little half gallon tank attached to the inside of my front bumper bar. I drilled four holes and ran zip ties through them and the tank to secure it.

crispone wrote:HA HA! How come every time someone decides NOT to part-out/sell their vehicle, it means dropping a CHUNK OF CHANGE into it again???!!! :o

G/L with the adds! :wink:

-crisp :evilbat:


Nozzle, pulley, and belt doesn't add up to too much lol.


yeah all those parts were already in the garage...but the change comes into play when I go back to the dyno...$$$.



Keeping a car you were considering selling and planning some performance upgrade mods instead is ALWAYS a recipe for SOME degree of $$$ output. The question is simply HOW MANY and for HOW LONG. 8)


Many of us are on that ride right now... :wink:


-crisp :evilbat:
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Re: 7 psi belt length...+methanol

Postby hskrsolara » Sat May 14, 2011 7:09 pm

Yeah, almost an emotional roller coaster of sorts...oh well, we'll give it one last big go and see what happens!

My dream project still remains the same... procharged LS2 powered IS300. Someday.
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Re: 7 psi belt length...+methanol

Postby crispone » Sun May 15, 2011 7:45 am

hskrsolara wrote:Yeah, almost an emotional roller coaster of sorts...oh well, we'll give it one last big go and see what happens!

My dream project still remains the same... procharged LS2 powered IS300. Someday.



You gotta hold onto those dreams, even when they are worst nightmares for YEARS in-between! I've been through enough with the Supra after 17 years now, that I can probably weather just about ANY downturn storm with it at this point. Between that and motorcycles that are even OLDER, but still rewarding enough to run WITH current machines, and FAR outweigh them in "character and appeal".

The Solara will continue to be a neat machine for years to come... and someday, not be unlike muscle cars (MODERATE models, as "MUSCLE" may be a stretch) but from a more recent era, very much an "OUR GENERATION" thing for many of you.


...some of us are a bit older, but appreciate the process and dynamic all the same. :wink:



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Re: 7 psi belt length...+methanol

Postby hskrsolara » Sun May 22, 2011 10:53 am

So, did a little research. auto parts store guys were absolutely no help, so I did some calculating of my own.

The belt I had on with the 5.5 psi (2.9" diameter) was the Goodyear Gatorback 6pk2240 (88.25" inside length). I believe this was the preferred length posted often on SG back in the day. When I took off the belt/pulley, I noticed quite a bit of belt dust in the idler assembly and pulley...slippage perhaps? The belt is in great shape, maybe it was just a touch too long.

The 6.5 lb pulley is 2.7" diameter. The difference in circumference of the pulleys is 0.628". So, it would be safe to assume I need a belt that is as least 0.628" shorter than the old, correct? Even though, I know the belt only contacts half of the pulley, so maybe one could argue that I only need a belt that is .314" shorter than the old one...

The next size smaller gatorback is the 6pk2220, which is 87.5" long (.75" shorter than the 5.5psi belt). Should be safe to go with this one, right? Or, I could drop 2 sizes and go with the 6pk2215 which is 87.25" long. (a full 1" shorter than the 5.5psi belt) Could this put too much strain on the auto tensioner?

I only want to install this belt once, I forgot how much of a PITA it was to switch belts and would like to get it right the first time. I absolutely do not want any slippage when we dyno or the next time I race my buddies modded G8 or modded Mustang GT. Any advice?

Should I just can the gatorback and look at dayco? I thought that the gatorbacks were supposed to be better...but havent bought a new belt in a while. Sounds like the LS1/LS2 guys like the gates belts, the SVT guys like the gatorbacks...
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Re: 7 psi belt length...+methanol

Postby stringbean » Sun May 22, 2011 3:31 pm

i know for my friends regal we tapped his huge sc because of it being carb, with a 625 and were thinking of adding a carb spacer to tap with a smaller one. but my friends Cobalt ss/sc has just a 625 and runs cold!

for our cars id either tap a tb spacer or the sc just from personal experience anyways.

ive decided when i get a sc for my car this summer (cause thats my main goal is a SC!) im tapping the sc and TB spacer i have. but dont go smaller then the 625
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Re: 7 psi belt length...+methanol

Postby hskrsolara » Sun May 22, 2011 7:03 pm

Well, went with a gates green line 87.25" belt. Other forums said the gatorbacks tend to stretch but the gates don't. Looks like the ls1/ls2 vortech kits ship with gates, so they must be capable of holding high HP #'s. Now hopefully the 1" shorter belt will fit...going to find out tonight!
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Re: 7 psi belt length...+methanol

Postby hskrsolara » Mon May 23, 2011 10:25 pm

scratch the 87.25"...too tight. for the 6.5 lb pulley, I went with the 87 5/8" gates green stripe belt. took it out for a quick spin and I have all of 6 lb of boost with a spike of up to 6.5-7 psi. this car is a different beast, cant wait for the tune and some full pulls.

Question: I noticed the s/c is noticably louder now than before...could this be a symptom of having the belt too tight? What is the best way to check for proper belt tension?

It was squealing pretty good earlier, so I immediately loosened up the belt at the alternator and it went away...thinking I still have it too tight. The auto tensioner only has about 1 inch of slack to move on...I want it as tight as possible, just dont want it slipping.

Coupler and oil is 10k miles old...they should be good still.

When I turn the s/c by hand, with the motor off, it is quiet...just the usual faint noice of the rotors spinning. I'm thinking it has to be that the belt is too tight.
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Re: 7 psi belt length...+methanol

Postby hskrsolara » Mon May 23, 2011 11:26 pm

Another thought is the idler pulleys and auto tensioner need replacing...i spun all of the pulleys and didnt notice any resistance. Should I replace them anyways?
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Re: 7 psi belt length...+methanol

Postby trd4life » Thu May 26, 2011 3:18 pm

yeah it wouldnt hurt to change the idlers i have had issues with them for sure.
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