speedy223
Veteran Member
- Joined
- Apr 8, 2015
- Location
- east texas
- TDI
- alh tdi new beetle 98, alh jetta 01, bew golf 04 all 5spds
just seeing if anyone has there 2 cents to toss in this pile. any suggestions are welcome.
1998 New Beetle ALH 5spd. had a Borg Warner BV39 turbo added 80k ago, kerma tune, Bosio DLC 1019 injectors, 3 bar map etc. south bend stage 2 endurance and SMF ran great.
then turbo failed. i suspect a boost leak causing overspeed of turbo, wife never noticed...it is her car. either way, turbo failed.
I inspected bearings, and also suspected minor head gasket leak from an overheat after losing fan in summer on way home (237F top temp recorded on scan guage while she was stuck in traffic) long story short, decided to pull block to do bearings, and head gasket.
for now installed a lower mile ALH motor from an auto beetle i bought with a bad transmission, ran great and has the 11 mm pump too. i decided to go with the VNT 17 this time around, and it is here and on the block now, hanging back in the car.
this was the background on the car... now for the question>.
I bought a FMIC and have been playing around with the idea of using it on the beetle, here is where the question lies....
A.) is it worth it over the stock miserable SMIC the beetle uses.
B.) i know it will help some but will the extra length of pipe cause lag issues that negate the benefits?
C.) how much does increasing the diameter of the pipe influence lag?
i bought and plan on using a 2.5 inch pipe off the turbo, which will then go through the intercooler (front mounted below the bumper) and back around behind the intercooler and up thru where the pipe would normally travel dropping to a 2.25 inch pipe.
I am dropping to 2.25 because that is the size i found that has a 3 bar map sensor mounting point and into the intake via a 2.25 inlet that replaces the egr.
i have it pretty well set up as to how it will go and only need to modify the front clip a bit to get it to work.
however i am wondering is it worth it. i realize i am really just assumign that the FMIC will be a great benefit but not sure if the extra pipe diameter and length will make it worthwhile.
i plan on finishing it as much as possible next weekend when i have some days off but was curious what the people that understand this better than i do think about it.
it would sure be easier just to shove the old SMIC and pipes back in and use my capped off EGR valve which is tapped for boost but if it is worthwhile i dont mind spending the extra day actually mounting it in where it will stay.
any opinions or knowledge about this very welcome. i really enjoy learning about these cars and i am not a mechanic by trade simply by hobby.
thanks in advance
1998 New Beetle ALH 5spd. had a Borg Warner BV39 turbo added 80k ago, kerma tune, Bosio DLC 1019 injectors, 3 bar map etc. south bend stage 2 endurance and SMF ran great.
then turbo failed. i suspect a boost leak causing overspeed of turbo, wife never noticed...it is her car. either way, turbo failed.
I inspected bearings, and also suspected minor head gasket leak from an overheat after losing fan in summer on way home (237F top temp recorded on scan guage while she was stuck in traffic) long story short, decided to pull block to do bearings, and head gasket.
for now installed a lower mile ALH motor from an auto beetle i bought with a bad transmission, ran great and has the 11 mm pump too. i decided to go with the VNT 17 this time around, and it is here and on the block now, hanging back in the car.
this was the background on the car... now for the question>.
I bought a FMIC and have been playing around with the idea of using it on the beetle, here is where the question lies....
A.) is it worth it over the stock miserable SMIC the beetle uses.
B.) i know it will help some but will the extra length of pipe cause lag issues that negate the benefits?
C.) how much does increasing the diameter of the pipe influence lag?
i bought and plan on using a 2.5 inch pipe off the turbo, which will then go through the intercooler (front mounted below the bumper) and back around behind the intercooler and up thru where the pipe would normally travel dropping to a 2.25 inch pipe.
I am dropping to 2.25 because that is the size i found that has a 3 bar map sensor mounting point and into the intake via a 2.25 inlet that replaces the egr.
i have it pretty well set up as to how it will go and only need to modify the front clip a bit to get it to work.
however i am wondering is it worth it. i realize i am really just assumign that the FMIC will be a great benefit but not sure if the extra pipe diameter and length will make it worthwhile.
i plan on finishing it as much as possible next weekend when i have some days off but was curious what the people that understand this better than i do think about it.
it would sure be easier just to shove the old SMIC and pipes back in and use my capped off EGR valve which is tapped for boost but if it is worthwhile i dont mind spending the extra day actually mounting it in where it will stay.
any opinions or knowledge about this very welcome. i really enjoy learning about these cars and i am not a mechanic by trade simply by hobby.
thanks in advance