Is the First intake worth putting on a stock l98 and if so what type of gains can expexct thanks guys looking into this system just want to get some info before i put down 1200 or so dollars

 

Everything else stock I would say no. no sense bringing all that air in if you can't get it out.

 

ok thanks for the response

 

You might gain around 15-20 hp though a full exhaust would probably help more, don't forget to do something with the intake track to cause the firebird ones are crap.

 

https://www.thirdgen.org/forums/post...43-post41.html

The link above is from another FIRST post that a member entered HP point from an old article from May 1989 Car Craft.

The baseline was a totally stock TPI unit with a stock chip set at 6 degrees

The AS&M set up is a hand ported stock base with their AS&M runners and ported plenum using a stock chip at 6 degrees

SLP brought a prototype intake called the ShortRam that never made it to production. It looks VERY much like the Holley StealthRam and they brought a custom chip to use for testing.

TPiS used the "Big Mouth" intake, their Semi-Siamesed runners, an air foil, and a modified MAF sensor, stock chip,,, set at 6 degrees.

Air Sensors, FIRST used it's single mono blade throttle body,,, which should flow around 800 cfm,, it's own fueling electronics, and 4" MAF sensor with a mechanical advanced distributor set at 6 degrees.

This was basically a stock L98 with the old Edelbrock 1.5" / 1.625" headers running through an F-body dual cat exhaust system. I doubt very seriously any of the systems were nuts on tuned but I doubt they were way off either. The FIRST unit might have had an advantage of user tuning,,,, that might be good,,, it might be bad. It had an advantage with a larger MAF sensor and throttle body than the rest,,, but it's not like this stock engine actually needed it. So,, I think the results would have been within a couple HP using the stock TPI electronics and ported MAF.

So, it I’d guess swapping the stock intake to the FIRST using the same electronics on a stock engine, assuming it already has a decent exhaust system to begin with would yield about 20 HP in the cell and about 16RWHP with an automatic.

 

great thanks don't really think that is the way to go them

 

well i switched to a modded tpi to a first injection tpi setup and i felt a big difference in mid range and upper rpms but my engine is far from stock...

id say for a stock engine its not worth the swap considering you need to make up your own fuel lines and make some of your factory wires abit longer...