Heatsoak or Too much timing causing knock?

[DJ23GSX]

Im having an issue with knock in higher rpms (5-7k) I can tune it and make quite a few back to back pulls at 15psi with 0 knock but eventually I start to see knock the more I keep making pulls. It sounds like heatsoak to me but I thought the stock smic could handle the 14b at that boost level especially in this cool new england weather. I know 2nd gear boost goes up to about 17psi but 3rd and 4th are a solid 15psi and those are the gears I tune/datalog in. I've also noticed that my timing is a bit high in the upper rpm's as well. I am seeing anywhere from 22-25* of timing from 5-7k rpms. I've done many boost leak tests and my only leak is at the tb shaft seals but they aren't that bad at all.

Here is my short mod list

stock smic
14b with a ported 7cm turbine housing
Ported 2g exhaust manifold
Tubular o2 housing
Evo9 560's
Walbro 190 Rewired
Safc
Hallman boost controller
Stock 1g maf with open stock air filter After a few pulls intake temps at the maf are climbing over 100* and probly not helping me at all.
3" Thermal catback
Base Timing is a touch under the 5* line

I have a Buschur street core fmic and pipes, 2g maf with 3" hard intake pipe with a K&N and new tb shaft seals waiting to go in but I'd like some input on this issue first and have to wait for some better weather (no garage )

 

[doubled07]

I am going with heatsoak. The stock side mounts are just a bottle neck design and have very poor cooling efficiencies. I had knock on a street core like you are about to put in. Upgraded to the new Buschur 4" Garrett core. Knock went bye bye.
He's been posting dyno pulls with other fmic in comparison

Random FMIC information with a little turbo info mixed in.....

 

[Bluefire16]

^^ then what you are saying contradicts guys running 12s on 14bs with the stock sidemount.

Basically your saying all of them should be heat soaked? They are running more of 20+ psi on those times, so i doubt its heat soak.

 

[Colt4G63 also]

Try lowering your timing. The 1g timing map is pretty agressive.

 

[MI48UR8]

^^ then what you are saying contradicts guys running 12s on 14bs with the stock sidemount.

Basically your saying all of them should be heat soaked? They are running more of 20+ psi on those times, so i doubt its heat soak.

But they are not doing back to back pulls. I single 1/4mile pass will not heatsoak a side mount like back to back pulls will.

Im having an issue with knock in higher rpms (5-7k) I can tune it and make quite a few back to back pulls at 15psi with 0 knock but eventually I start to see knock the more I keep making pulls. It sounds like heatsoak to me but I thought the stock smic could handle the 14b at that boost level especially in this cool new england weather. I know 2nd gear boost goes up to about 17psi but 3rd and 4th are a solid 15psi and those are the gears I tune/datalog in. I've also noticed that my timing is a bit high in the upper rpm's as well. I am seeing anywhere from 22-25* of timing from 5-7k rpms. I've done many boost leak tests and my only leak is at the tb shaft seals but they aren't that bad at all.

Here is my short mod list

stock smic
14b with a ported 7cm turbine housing
Ported 2g exhaust manifold
Tubular o2 housing
Evo9 560's
Walbro 190 Rewired
Safc
Hallman boost controller
Stock 1g maf with open stock air filter After a few pulls intake temps at the maf are climbing over 100* and probly not helping me at all.
3" Thermal catback
Base Timing is a touch under the 5* line

I have a Buschur street core fmic and pipes, 2g maf with 3" hard intake pipe with a K&N and new tb shaft seals waiting to go in but I'd like some input on this issue first and have to wait for some better weather (no garage )

Quit wasting your time with the stock side mount man. FMIC will cure that problem.

 

[DJ23GSX]

I am going with heatsoak. The stock side mounts are just a bottle neck design and have very poor cooling efficiencies. I had knock on a street core like you are about to put in. Upgraded to the new Buschur 4" Garrett core. Knock went bye bye.
He's been posting dyno pulls with other fmic in comparison

Random FMIC information with a little turbo info mixed in.....

Great info in that link but now you got me worried about my Buschur street core . Its the older 3.5" thick core they used to sell.

Try lowering your timing. The 1g timing map is pretty agressive.

My base timing is already lower than stock. I would say its around 4* right now. How much lower can I go before it starts affecting performance?

Quit wasting your time with the stock side mount man. FMIC will cure that problem.

The FMIC install started today