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Any feedback on Adam's Polish, specifically the machine polish for the dual action buffer? Seems like a good product and was thinking of buying one of the kits with the Porter Cable D/A buffer.

What is a realistic power output from an alky kit (razor) on a stock long block 87 GN Ttop? Car has the required fuel pump, hot wire, scanmaster and will run on 91 octane with methanol.

On a stock 87 GN with all the required upgrades (scanmaster, Adj regulator, fuel pump, hot wire, ram air intake, etc..) What is the psi limit of the stock turbo with alky before it becomes inefficient? Maybe Razor can chime in.

Does converting over to a mild roller cam set-up (206/206) hurt the value of these cars? I understand that the rollers are better with todays motor oils. But $800+ for a kit can buy alot of zinc oil additives. Is the drivability that much better with a roller set-up?

Just wanted to know which you prefer and why?

Anyone know a company that sells hollow or fake Cat Converter for our cars?

Other than porting the stock elbow and enlarging the waste gate puck hole, what else is restricting the stock DP? I've read they are good to high 11's and 115 mph.

Will a gutted cat converter help spool the turbo faster vs. a hi-flow cat. This is with a stock turbo now but want to upgrade to a ta49 te44 with .63 Garrett housing. I don't want to change the stock D5 converter. Also, car has 2.5" GNX type exhaust with dynomax mufflers.

At what point does the stock IC need to be upgraded? All things equal, I think a stock turbo with alky is fine with the stock IC (91 octane 23-25 psi). If you were to step-up the turbo to a ta49 or te44 with alky, is the stock IC a problem? Would a Dutt neck upgrade be enough as well a ported...

At what point is it recommended to replace the Factory Valve Springs? I understand that they are week (70-80lbs new). Would new 100lb springs put extra pressure on the plastic timing gears and promote cam lobe wear? Also, is the Kirban set decent? Lastly, who sells the spring removal tool?

Since methanol is a fuel, are stock injectors sufficient with Razor's kit? Currently, car has Red's fuel pump, Casper's hot wire, adjustable wastegate actuator, Red's 93 chip, hi-flow cat and 2.5" dual exhaust.

On a well maintained car with 60,000 miles and mild mods (fuel pump, hot wire, 2.5" dual exhaust, hi-flow cat, RED's 93 chip and 19lb boost), is the super servo, deep trans pan and trans cooler suffucient? Kirban sells them and it looks like something that can be done in an afternoon? Thanks, Leo

Do spash guards (mud flaps) help save the rear quarter panel paint from derbris and the occational burnout? Kirban has some OEM ones that look ok.

Hello All, First Post here. Great site with a lot of useful information. I am in the process of buying an 87 GN. It is a 61,000 mile T-top with concert sound and light mods. As for my question, I read many threads about the sound staging with these Regals and I am a bit confused. I have...