I have a 85 GSL-SE and around 3700/3800 I feel the 6 ports come in, but above 6k I don’t feel the power I think I should. It will climb on up to 7k, but it doesn’t want to. It climbs from 5-6k just fine. I would thing it would climb from 6-7k even quicker. I bought the car this way and I’ve never driven a GSL-SE before this, so I’m not sure how it should drive. Any ideas?

 

Based on your question, I can assume that you are running stock exhaust. Which is very restrictive at the 6k+ RPM and above. Stock set up power curves show that there is actually drop off of power at 6k. A well designed free flowing exhaust and headers will solve this problem.

John

 

plus it's only going to get so much air from the stock afm
thats pretty much the best it'll get untill you do some exhuast mods.

 

exhaust, direct fire, and get rid off the factory fuel pump. Mine goes to 7500 alot quicker since I did the pump and direct fire.

 

mine does sortof the same thing. i can feel the car pulling up until about 6k rpms then from 6k to 7k the tach just just slips to 7k. (i.e. the car doesn't pull). also stock exhaust......until tuesday

 

mine does really well in 1 & 2, good in 3, then kinda dies off after 6k in 4 and 5.

 

i agree, mine does die off after 6K. going to redline in 4th dials up 108mph and after that the car is not too slow but doesn't pull much after 110mph. i had the SE up to 120mph today and it felt like it had the power. i need the racing beat dual pipe setup. i have to wait until the 1st of july to get it.