Has anybody ever seen a 18g compresser map?I would like to compare it to the big16g and the small16g.I've searched but came up with nothing. Any help would be great!
Thanks-
Thanks-
18g compresser map??
green92gsx
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56 Posts
18g is an awesome turbo. I've done a lot of research on it. Probably the perfect turbo for running 11's in a daily drive. That 20g pesky lag reeeeeeeally sucks around town. i think that might be the way im going to go too if i can save enough money
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412 Posts
Update!
Well I have the FP18g installed and made only 2 trips to the track so far.The car is not my daily driver so I haven't had alot of time to get a good tune so far.I get full boost (20psi) by 3600k and it pulls vary well on the top end.
I just installed a Msd dis-2 in my car the first time to the track.What we didn't realize that we knocked my AFC offline when splicing the rpm wire.DOH! So first time out with no afc, 550's, plenty rich,and crap for timing advance I managed a 12.55 at 110.Not bad but was pissed about the tune of the car.
Next time out with AFC in working order, on the way to the track my Dis-2 freaks out and throws a CE light and the car stalls.Wtf?? So with the dis-2 in bypass mode I ran my personal best 12.22 at 111.67 with 23psi.
My car was knocking pretty bad in 3rd and 4th,thats why my mph is tweaking. I was running way to lean. I'm used to the 14b tune where I used to take like -30 away on the afc. Now it's at -12 at 23psi with no knock and 28* of advance.
I would say that this turbo moves a good amount of air.I had to give back almost 17% more fuel to make up for it. Next time out I will get some mph back and hopefully run some 11's.
Thanks everyone for the help!
Well I have the FP18g installed and made only 2 trips to the track so far.The car is not my daily driver so I haven't had alot of time to get a good tune so far.I get full boost (20psi) by 3600k and it pulls vary well on the top end.
I just installed a Msd dis-2 in my car the first time to the track.What we didn't realize that we knocked my AFC offline when splicing the rpm wire.DOH! So first time out with no afc, 550's, plenty rich,and crap for timing advance I managed a 12.55 at 110.Not bad but was pissed about the tune of the car.
Next time out with AFC in working order, on the way to the track my Dis-2 freaks out and throws a CE light and the car stalls.Wtf?? So with the dis-2 in bypass mode I ran my personal best 12.22 at 111.67 with 23psi.
My car was knocking pretty bad in 3rd and 4th,thats why my mph is tweaking. I was running way to lean. I'm used to the 14b tune where I used to take like -30 away on the afc. Now it's at -12 at 23psi with no knock and 28* of advance.
I would say that this turbo moves a good amount of air.I had to give back almost 17% more fuel to make up for it. Next time out I will get some mph back and hopefully run some 11's.
Thanks everyone for the help!
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390 Posts
green92gsx I have a similar setup as you running 20psi on my 18g yet i could only manage a 13.22@103 with a strong 30mph headwind. I think i'm running really rich tho, my afc settings are from about 0 at 3k to +7 at 7k rpm...no logger. only hitting 1800Hz
For all you 18g guys what are your afc settings?
For all you 18g guys what are your afc settings?
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598 Posts
(this is green92gsx)
I was seeing a max 2200hz with a 2g mass.
I'm going to see how far the td05 housing will take me. I have a modifiyed tdo6 housing with a 3'in inlet(same as greddy 18g) that will go on at the end of the season.
I was seeing a max 2200hz with a 2g mass.
I'm going to see how far the td05 housing will take me. I have a modifiyed tdo6 housing with a 3'in inlet(same as greddy 18g) that will go on at the end of the season.
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390 Posts
2200Hz at what PSI?
I sure wish I knew why I can only get 1850Hz out of my car, I'm starting to lose my patience with this damn car. I can't wait to datalog it to find out whats up with knock & timing.
I sure wish I knew why I can only get 1850Hz out of my car, I'm starting to lose my patience with this damn car. I can't wait to datalog it to find out whats up with knock & timing.
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412 Posts
It was at 24psi, sorry I thought I put that in.
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390 Posts
Have you ever run it at 20psi or close to that and do you remember your Hz readings?
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412 Posts
I'm green92's brother...when we first took the car out at 18psi it hit just over 2000hz. I was like damn...this turbo must really be moving some air or you have a boost leak. We pressure tested the car not to long before the 18g was put on and there were a few small leaks(injector seals) but nothing major. Perhaps we should do another pressure test. His 2g mas is completely stock though...all honeycombs in and the screw has never been touched.
On my car w/ a 1g blaha style hacked mas and a small 16g i pull a little over 1800 hz @ 24psi....just for a comparison.
On my car w/ a 1g blaha style hacked mas and a small 16g i pull a little over 1800 hz @ 24psi....just for a comparison.
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390 Posts
Thanks, now I have something to compare to since we seem to have almost the same setups.
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412 Posts
Just to let you know I do have some horrible boost leaks so don't use my hz # for comparison.
are you nuts? i have a friend who runs a td06-20g in his gvr4 who gets 23 psi by 3900rpm. that turbo spools almost as fast as a 16g. ive driven the thing, it's amazing. the problem with the 18g is that pos td05 compressor housing. that thing needs to run 22 psi just to be somewhat efficient. as far as im concerned, a 20g or an FP greentoosmallt25 said:
are the best streetable, standard bushing, 11 sec turbos around.
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413 Posts
My 18G is in a TD06 housing, so does that make mine more effiecent than yours?
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412 Posts
Yes, talking to a respectable turbo vender it's raises efficiency
about 7% across the map.
I'm getting 18psi by 3500k and 25psi at 4000K,with the boost leaks fixed. Now my wastgate actuator is not working properly and not giving me soild boost control.
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413 Posts
Full spool at 3700.
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