So what parts on an L61 motor are not rated past 300 horsepower? I was contemplating the idea of twincharging my car. I have a 2.2 l61 motor. The plumbing seems pretty straight forward. Air goes into the filter into the turbo, turbo to intercooler, intercooler to the throttle body, throttle body to the supercharger to the intake manifold to the motor. Right? Tuning I would just do hp or trifecta or zzp, not too worried there. I would then need a bov and the oil feed lines like I would on any other turbo setup which should be pretty simple. I know for internals I'd need rods and pistons. What other internals are mandatory that I upgrade? And what other obstacles am I forgetting about?

 

You would be unique but I'm pretty sure people don't twin charge for a reason, and I think that reason is performance. I vote snail only. Theres a nice graph floating around I will see if I can find it for ya. You should download the GM build book too

 

yeah i understand I'd make more power turbo. In fact I don't really want to make more than 300hp, its mostly just to say yeah I am twincharged. I'll probably run my pulley down to a stock supercharger pulley and the smallest turbo possible. Keep the boost around 15 or so. I'm doing it just to say "yeah i am twincharged"

its the internals I'm worried about though cause they are probably gonna cost more to upgrade than the turbo parts.

 

if you're worried about your internals dont do it.. cyl pressure will be nuts

 

even if its still only like 12-15 lbs of boost? and with aftermarket ****

 

This guy knows stuff about things.



Here's the post:
https://www.cobaltss.net/forums/5370044-post5.html


EDIT: I don't know enough to say if that chart would hold true for a twincharged setup or not. That's an estimation as well so..

 

thank you so much

 

idk what aftermarket **** your'e talking about ..

but it's not always about boost.. it's about engine temps and cylinder pressure boost =/= power.. also using a small turbo defeats the purpose of twincharging the turbo is suppoed to be used to make it more power a small turbo will hold back your setup..

also with twincharging 2+2=/= 4 lol

i'm in the process of looking into twincharging my car in a totally different way for a similar reason to you using the procharger i have as well as the lnf turbo usin the lnf turbo for low end and procharger for top end.. however it's not even a great idea lol

and nooblar i've been around the block a few times lol

 

well would an heat exchanger and intercooler suffice in cooling it? and I wouldn't use a the worlds smallest turbo but probably just the stock lnf one or something similiar. And would my internals be alright upgrading the rods, pistons, valves, and possibly the fuel pump? And how do I control cylinder pressure boost?
And a procharger and a turbo on one motor would be awesome.

 

if you're doing pistons and rods then you could be ok .. but idk if your sleeves can handle it .. it's not a matter of cooling the intake charge really.. i mean obviously hotter air in is going to make the issue worse.. however... cylinder pressures will cause increased temp..

also the lnf turbo.. is mighty small and you will have nothing pushing out for top end..

it's not cylinder pressure boost .. it's just overall cylinder pressure if the cyl pressures get too high you can crack a sleeve and then game over. the fuel pump should be fine.. i'd say pistons rods. maybe sleeves (2.2s arent my forte) as well as ported head with valve springs and valves if you want

a ported head can help cylinder pressure as it increases flow and reduces restriction.. however not a total fix

as far as procharger and turbo.. my issue is who knows how much boost it'll push.. and obviously i dont want to push out 21 psi on a stock motor even thought the 2006 2.4s are much more stout then a 2.2. i'm looking to put out wastegate pressure on the turbv (should be about 7 psi) then a 2.95 pulley on the blower.. which is about 10 psi that could push anywhere from 15-25 psi lol depending on how boost stacks ..

 

well I probably won't get a ported head. other then upgrading the sleeves how can I compensate for the increased cylinder pressure? And yeah I know a stock turbo is small but that is kind of what I want