axelg89

Hi,

Been searching around but can't find an answer to my perhaps a little strange question.

I live in Sweden and this winter I'm swapping a LS1 t56 combo into my corvette 1969. I've dreamt of this for a long time and now it's finally happening. The swap itself will be a lot of work and when that all is done there will be alot of work getting the car road legal with the new engine. The restrictions lies in power and I'm not allowed to make more then 430 fwhp, will have to be dyno proven.

As I'm going through all of this I'm thinking about supercharging the engine already from the start so that I'll have all the mods in the new title.

My question is if it's possible to get the engine with a supercharger (needs to be at "reasonable" boost (according to law), say 6-8 psi) to perform less then 430 fwhp. Would like to have an intercooler in there too if possible. All stock healthy 02 camaro ls1 with stock f-body exhaust manifolds, no cats.

Once all the paperwork is in order the tune can be changed and the boost can be upped as it will never have to be dynoed again for the yearly inspections.

Thanks
//Axel from Sweden

9sectruck

iTrader: (9)

are you wanting to buy a engine complete with blower or buy the engine and a blower kit sep.

axelg89

Already got the engine, trans etc. so I'll in the case buy only the blower

slow67

iTrader: (2)

Put super restrictive exhaust on it. Boost will go up and power will go down.

Strokinit383

iTrader: (22)

Just pick up an eaton m112. Will be torquey and fun on the street but not produce too much power on low boost.

JAX04

iTrader: (17)

WOW! you guys are only allowed 430fwhp? That is nuts!

9sectruck

iTrader: (9)

IM assuming that you will get it passed by state law then turn it up.. I would buy the biggest blower you can buy procharger d1sc or a biggest roots blower that you can

axelg89

My stock corvette sb hood don't leave me much room för a roots and the work to get a m112 in there would be pretty big. I rather stay with a vortech style supercharger. When it comes to torque I also don't want to much as there is restrictions there too. Crappy county when it comes to driving legaly.

So it should be possible? 6 pounds of boost, some restrictive timing and a not to open exhaust would put me under 430 fwhp on a stock ls1?

430 fwhp is increadibly around here. If the car is newer then 1975 your not allowed to do anything (FI is out of question) and pre 1975 the usual is around 200 fwhp. Corvette pre 71 is the real exception when that much power is allowed here!

Then ofcourse we have a huge amount of people driving around putting turbos on after inpection every year and a great deal driving not legaly uninspected. Fines are small and there is no real problem driving not legal untill **** hits the fan and your insurance wont cover because you were not inspected.

Would like to be able to turn it up but don't really see the point in going too big. Will be aiming below 500 rwhp on e85 when all is done and that should be possible without too much of a hussle? Anything above that will break my car, my wallet and probally take my life

Thanks for all the quick answers

oange ss

iTrader: (50)

pull a bunch of timing out of the tune and rev limit it to 4500 rpms

axelg89

rev limits not allowed. Have to see that power is peaking on the dyno graph and boost has too be set reasonably according to the equipment used. Ex: can't have a huge turbo, dual A1000 and 160# injectors and boost 3 psi.

But I can have some stock injectors, a 255lph pump and a stock exhaust a charge 6 psi from a base model vortech supercharger

js2fst

iTrader: (12)

Waste gate with a boost controler put in valet mode. Procharger p-1sc or d-1sc

axelg89

As I said before lowering the boost too much wont really help me as it needs to be boosted reasonably given the things that are on it. Need to get that power <430 without going under 5psi (VERY LOWEST) or using rev limiters.

SPRAYED 01

iTrader: (22)

I can't believe the government puts that much effort into this. To have to prove it on a dyno? Does the government provide the dyno?

axelg89

nope they don't really and all of their effort is payed by me.

The new paperwork will be about $300 inspection fees + $200 admin fees and about $300 for the dyno (expensive dynoshops as there are only a few in the country licensed by the goverment to make approved power verifications).

The goverment doesn't really check everything but the dyno shops are very careful with their license and won't let you pass with any cheap work-arounds.

Seems a bit easier in the states.

Mike@Diablosport

iTrader: (2)

why bother with a blower?

430 rwhp can be had from a simple cam swap or decent head/cam combo...

axelg89

Hi Mike,

The 2 main reasons for a supercharger compared to a H/C swap would be:
1. Can turn boost up the day I want moore. The 430 is just to get the supercharger into the paperwork.
2. Keep my fuel economy when staying of it on long trips. Gas is currently $9.2/US gallon here and rising.

Am I thinking badly?

ddnspider

iTrader: (26)

Go the tune route. Get what you want and then have the power dropped in the tune. What happens if you put a small supercharger on it or restrictive exhaust and still make 430fwhp? At that point it sounds like youre screwed.

axelg89

Yupp. If I buy the supercharger, mount it, put a restrictive exhaust on it and make a real lousy tune and still get 430 fwhp I'm "screwed". Can always take it all off and sell it but wanted to get some opinions from guys having alot more dyno/tuning time then me to see how far down I could push numbers with the same boost but a lousy tune.

ddnspider

iTrader: (26)

The nastiest motor in the world wont make power without timing and a good air/fuel ratio.

bigdog7373

It's simple. Move.
What kind of government regulates your car's power output!?