Does anyone know any tricks to get a turbo to spool faster. Any turbo, on a chevy 355.

 

probably covered in a search a few times, but here goes.

swapping the exhaust side to a smaller size
heat coating/wrapping
nitrous oxide
changing / retarding / advancing your cam
two step / anti lag
longer gears

just to name afew

 

Bigger dump pipe or larger from turbine, no baffled mufflers.. ...
Back pressure here is bad news..
Play around with timing and fuel tables...
Retarded timeing can help spool...
BTA advanced brings engine up on converter ...
Experiment either way.. Yes a two step works well...

 

Whats a two step?

 

http://www.summitracing.com/search/...e/MSD-Two-Step-Module-Selectors/?autoview=SKU

 

How would that effect spooling?

 

When the car is on the 2 step, it drops spark but keeps fuel flowing. The fuel ends up igniting in the exhaust and really gets that wheel going.

 

https://www.theturboforums.com/smf/index.php?topic=124541.0

 

Twin scroll housing turbo with a spool valve......simple and it works.

 

Anyone making these at a " reasonable " price yet ?

 

The spool valve or the turbos?

 

the spool valves . Last I heard they were around $500


just saw the Ebay link . yea , $500 . Its almost tempting . My S480 spools pretty good , but it would be nice to see the difference .

 

Does anyone know how much a stock 4 bolt main chevy 350 block can handle? How about with main studs?

 

I am surprised nobody mentioned this thread. All they did was cover 1 half of the twin scroll inlet. https://www.theturboforums.com/smf/index.php?topic=45148.0;topicseen

 

All the things listed are valid ways to make a turbo spool faster, but w/o knowing more about your combination, some of them will hurt the overall performance. If you have a bad tune and the wrong convertor on the car, changing the AR on the exhaust housing will help spool, but hurt top end because of back pressre. If you have an automatic, retarding timing will hurt spool. If you want help with your combo you need to post up specific details of build and current performance, not dyno mumbers or ET, but when it start showing boost.

 

It's worth the $500, at least to me. I run one made by a company that is out of business that sold them for $250. I can tell you I'd pay more for another one if I need it. Made a big difference on my car.


These are the results I got and I can improve them if I hold the valve shut until a certain point and let it snap open. I will be doing that next.
Turbo is a 1.25 a/r T4 S380 (thanks Jose).

 

honestly i think the Quick Spool Valve sounds like the best option to me

Just someone needs to cliff notes the 25 page thread regarding the spool valve. i would not mind paying $500 for it from soundperformance http://www.spracingonline.com/proje...com/store/Sound_Performance_Spool_Valve/3643'

i guess its boost activated with the hobbs switch and i guess it works automatically ???

 

Whats the strength of a chevy 350 4 bold block?

 

again, you should probably try out the search button . Trust me it works. I have researched this topic myself. But from what I have come across there are some guys pushing them to 800+. I'm not sure if those blocks were filled at all. The 2 bolt w/splayed mains is stronger I believe - but would cost more for machining and the new caps. And again as someone has already mentioned, what are you trying to do? certain ET? Certain HP goals? what do you have already to work with etc.

 

I'm running a stock 4 bolt one piece rear main block from a GM 350HO crate motor .


I should have an answer for you soon .