4v Bolt-on Question
09-08-2010, 05:13 PM
#1
4v Bolt-on Question
I've finally lined up enough cash to get a '99-'01 4v.
My question concerns "bolt-on" performance as I will only be able to mod lightly for a while i.e. no F/I.
I've never had a 4v... and can only gauge the effective performance gains on what I've done to my sixxer. Knowing that the two are worlds apart, what bolt-ons are worth the cash and what are more or less a waste? Feel free to add anything I've missed.
SCT tuner, CAI, UDP's, TB, MAF, Exhaust (LT's, Mid, Catback), and gears I know are a necessity but it's a question of 4.10's, 4.30's, or 4.56's?
My question concerns "bolt-on" performance as I will only be able to mod lightly for a while i.e. no F/I.
I've never had a 4v... and can only gauge the effective performance gains on what I've done to my sixxer. Knowing that the two are worlds apart, what bolt-ons are worth the cash and what are more or less a waste? Feel free to add anything I've missed.
SCT tuner, CAI, UDP's, TB, MAF, Exhaust (LT's, Mid, Catback), and gears I know are a necessity but it's a question of 4.10's, 4.30's, or 4.56's?
09-08-2010, 05:47 PM
#2
Banned
Join Date: Aug 2007
Location: AZ
Posts: 2,463
If your car is going to see a lot of freeway miles, definitely 4.10's... (4.30's and 4.56's will waste your gas and require higher rpm cruising) I would just do a nice exhaust (o/r x pipe and a 2.5 inch cat back of your choice), cold air intake, short throw shifter. I wouldn't bother with headers. And yeah, a custom dyno tune will make everything run better. SCT or Diablo...
There isn't much power to be gained with an aftermarket TB. The stock unit is pretty good. UD pulleys are really a waste of time, imho, as well.
There isn't much power to be gained with an aftermarket TB. The stock unit is pretty good. UD pulleys are really a waste of time, imho, as well.
Last edited by mfj; 09-08-2010 at 05:49 PM.
09-08-2010, 05:49 PM
#3
4th Gear Member
Join Date: Jan 2008
Location: gahanna ohio
Posts: 1,394
dyno tune, cai, udp, exhaust mid and catback forget headers and these cars need a gear bad i went with 4.10s with my 01 and got tired of them i much more like my 3.73 on my termi...i just got tired of shiftin often with the 4.10s
09-08-2010, 05:52 PM
#4
Banned
Join Date: Aug 2007
Location: AZ
Posts: 2,463
I wouldn't waste my time with UD pulleys. It MAY add 2-3 hp, if that...
09-08-2010, 06:42 PM
#5
Ok, thanks guys. Any other mods that should be a priority (IRS brace, subframe connectors, springs, etc?) mind you this will be pretty much a DD that may see some spirited summer driving with the rarest of track duty.
