# Turbo lag/hesitation.. **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [September 28, 2007, 1:19pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972 "2007-09-28T13:19:48Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 28, 2007, 1:19pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/1 "2007-09-28T13:19:48Z")
So I had just gotten my fmic setup done on my sr20, and just completed my S15 turbo install. So I took it for a quick rip down the street, and the turbo seems VERY laggy. The boost gauge is barely hitting the 2nd line above 0 (on a 1.5Bar w/ Vaccuum Gauge) Even when floored, the turbo barely makes any power. I checked all my lines, doesnt seem to be a boost leak anywhere, I do have a boost controller going in tomorrow, but i would imagine the s15 turbo making a little more power than that without having to crank it up. Has anyone else had this problem? Could it just be my enormous front mount causing a huge amount of lag for that size of turbo? The fmic core is approx. 32x12x3.5 w/ 3" ends. ---
**Author:** ![Garret\_Volden](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@Garret\_Volden](https://forums.speedlife.net/u/Garret_Volden)\ **Post date:** [September 28, 2007, 1:21pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/2 "2007-09-28T13:21:46Z")
so it never did that before u had the front mount? then i would say a big yes ---
**Author:** ![TyPhOOn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/typhoon/32/5800_2.png) [@TyPhOOn](https://forums.speedlife.net/u/TyPhOOn)\ **Post date:** [September 28, 2007, 1:47pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/3 "2007-09-28T13:47:56Z")
front mounts are laggy compared to sidemounts ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 28, 2007, 4:26pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/4 "2007-09-28T16:26:00Z")
but that much more lag? My Blitz LM that i had in my previous car (using the same piping with a bigger core) wasnt even close to that much lag, like hardly any at all. If its gonna be that laggy I think I’m gonna have to consider going a little smaller. EDIT: the new one isnt much bigger than my previous LM either. ---
**Author:** ![Nis240](https://avatars.discourse-cdn.com/v4/letter/n/a9a28c/32.png) [@Nis240](https://forums.speedlife.net/u/Nis240)\ **Post date:** [September 28, 2007, 4:38pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/5 "2007-09-28T16:38:30Z")
You probably have a different problem…Possibly a small boost leak. ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [September 28, 2007, 6:37pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/6 "2007-09-28T18:37:52Z")
Just turn up the boost. ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 28, 2007, 6:41pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/7 "2007-09-28T18:41:10Z")
I’ll check for the boost leak before cranking up the boost. ---
**Author:** ![silvertable58](https://avatars.discourse-cdn.com/v4/letter/s/e36b37/32.png) [@silvertable58](https://forums.speedlife.net/u/silvertable58)\ **Post date:** [September 28, 2007, 9:52pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/8 "2007-09-28T21:52:19Z")
hey dude i;m havin a similar problem…after putin on my fmic and bigger turbo…it seems like its lagy till i hit 4 rpm then bam power all the way. ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 29, 2007, 11:05am UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/9 "2007-09-29T11:05:20Z")
yeah, I dont get no BAM, just like 3-5psi of nothing…I’ll check for leaks this afternoon. ---
**Author:** ![Nis240](https://avatars.discourse-cdn.com/v4/letter/n/a9a28c/32.png) [@Nis240](https://forums.speedlife.net/u/Nis240)\ **Post date:** [September 29, 2007, 12:18pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/10 "2007-09-29T12:18:43Z")
Tightten up the actuator…3-4 psi isnt gonna do shit…Yehaw 30-40 hp above a stock SR20DE. Try giving it more boost, you cant make power without it… ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 29, 2007, 3:03pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/11 "2007-09-29T15:03:49Z")
the actuator on the turbo? it wasnt tampered with in my old 240, so why all this nonsense now? ---
**Author:** ![Buddyworm](https://avatars.discourse-cdn.com/v4/letter/b/85e7bf/32.png) [@Buddyworm](https://forums.speedlife.net/u/Buddyworm)\ **Post date:** [September 29, 2007, 3:27pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/12 "2007-09-29T15:27:24Z")
Sounds like a boost leak to me. You sure you hooked the vac lines back up to the IC piping? What about all the ones on your manifold? Stuff pops off sometimes. ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 30, 2007, 11:43am UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/13 "2007-09-30T11:43:22Z")
the manifold ones are all on, I dont have any vac lines coming off my IC piping other than the hotpipe one, but that one is just plugged off cause i wasnt sure where it was suppose to go. ---
**Author:** ![Buddyworm](https://avatars.discourse-cdn.com/v4/letter/b/85e7bf/32.png) [@Buddyworm](https://forums.speedlife.net/u/Buddyworm)\ **Post date:** [September 30, 2007, 1:25pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/14 "2007-09-30T13:25:42Z")
Actually now that I think of it…do you have a tubular exhaust manifold? Checked it for cracks? ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [September 30, 2007, 2:00pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/15 "2007-09-30T14:00:02Z")
Pretty sure there was no cracks when I installed the turbo last week, But I’ll double check. ---
**Author:** ![TyPhOOn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/typhoon/32/5800_2.png) [@TyPhOOn](https://forums.speedlife.net/u/TyPhOOn)\ **Post date:** [October 1, 2007, 9:53am UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/16 "2007-10-01T09:53:03Z")
> [@silvertable58](#): > > hey dude i;m havin a similar problem…after putin on my fmic and bigger turbo…it seems like its lagy till i hit 4 rpm then bam power all the way. this is what I meant by my comment earlier. Bigger snail and larger piping/IC core = laggierx2 ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [October 1, 2007, 11:26am UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/17 "2007-10-01T11:26:59Z")
I dont see how I could go from a no lag setup (same turbo, mani, everything but a smaller intercooler core, but once I put the one thats slightly bigger on, then bam, I lose all power… the blitz one had 2 3/4" endtanks, I’m still using my blitz piping, just running a 3" endtank core now. I would assume its the core, but even floored at like 5-6rpm I’m still only hitting .2-.3 Bar, if that. So there must be some sort of lag, loose pipe issue that I cant seem to find… Argh. I’m just gonna drive this thing off a cliff ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [October 1, 2007, 12:47pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/18 "2007-10-01T12:47:57Z")
Question: did some 180’s come with a stock boost controller? I had a little green gizmo with a knob on it. ---
**Author:** ![twofortyesex](https://avatars.discourse-cdn.com/v4/letter/t/b38774/32.png) [@twofortyesex](https://forums.speedlife.net/u/twofortyesex)\ **Post date:** [October 1, 2007, 6:37pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/19 "2007-10-01T18:37:04Z")
K, well I now have boost…except the bov isnt going off, not sure why, also the boost controller is spiking terribly! I took it for a quick rip down the road, and it jumped to 16psi!! I cant have that, the engine will be dead in a week. Its a Profec B Spec II if anyone knows how to set it, I want 6.5psi as Low and 10.5 as Hi ---
**Author:** ![GRIPPY](https://avatars.discourse-cdn.com/v4/letter/g/ad7895/32.png) [@GRIPPY](https://forums.speedlife.net/u/GRIPPY)\ **Post date:** [October 1, 2007, 9:26pm UTC](https://forums.speedlife.net/t/turbo-lag-hesitation/147972/20 "2007-10-01T21:26:21Z")
Your stock turbo’s wastsgate shouldnt allow it to get below 7 psi. If it does then you have a boost leak. And it sounds like you screwed something up with your boost controller. And yes 180’s came with a stock boost control solenoid, but it is to lower boost pressure when knock is detected. [Next page](https://forums.speedlife.net/t/turbo-lag-hesitation/147972.md?page=2)