Expected performance with mods
 

So yesterday I was at an American Cars Sunday on the Zandvoort circuit here in Holland. Lots of great cars, mainly the usual Firebirds, GTs, RAMs, but also a couple 300Cs, one actually doing drag races. I don't recall his times, except he went 160kph over the quarter mile line afaik.

It got me a bit hyped up so I was looking for what the possibilities are for our SRT (in my case a 05 Roadster with 55k km).

Some shops here have a Stage 2 chiptune giving 380HP with 485Nm (https://www.procartuning.nl/chiptuni...-6-335-pk.html ). Thats only the ECU. If I would also add or only mod the intake with a DCAI from needswings, thats also quite a boost.

Anyone more info? The info is quite scatered on this website. Dragtimes have some records of stock cars doing 12 or 11 second drags, which is quite fast. Jim seems to have made 10s with a different engine afaik.

Thanks in advance

Re: Expected performance wirh mods
 

with ecu,,tcu,,,headers (Needswings) open up your exhaust and a intake (needswingts) or a E55 intake system.larger heat exchanger (needswings) , you can expect high 11's or low 12's that is about it with the V6,,, jim
put in a V8 (E55 or SL55 then mid 11's with out any mods. I have another (sold my black 10.55 second crossfire) crossfire that i just put aV8 into it ,,,is it for sale yes for the right offer,, ran 11.78 no mods,, doing the exhast to 3" soon then the ecu and pulleys jim

Re: Expected performance wirh mods
 

Thanks for your response. I'm not really want to go dragracing, I'm just wondering what power I could out of the car with the mods. I don't want to go all-in right away, just see what the options are

Re: Expected performance wirh mods
 

with these mods you can expect 345 to 350 HP at the wheels each mod help each other, at the flywheel you have 348HP but at the wheels you have about 317. do one mod at a time,, intake,,, then ecu,, then exhaust ( remove the rear cats.),,then ecu that may be all u may want. that makes the car faster than most firebirds,,,corvetts and mustangs good luck. jim

Re: Expected performance wirh mods
 

I'm not sure how the law and my neighbors are willing to accept the removal of the cats. Driving away already makes kind of a statement heh ;).
What do you mean with 348HP at the flywheel and 317HP at the wheels? Is that without the mods?

Re: Expected performance wirh mods
 

Yes, That's without mods. Parasitical and drive train losses result in the lower number at the wheels. Frankly, wheel horse power is the only number that matters. I got 293 whp before doing any mods on my car, and am now at 355.

Re: Expected performance wirh mods
 

Thanks, that sounds fair. What mods do you have? I am a bit confused on what the pulley mod does.

I am not sure which one is ECU and wich one is TCU, I expect the last one

Re: Expected performance with mods
 

[QUOTE=Diamondo25;921922]So yesterday I was at an American Cars Sunday on the Zandvoort circuit here in Holland. Lots of great cars, mainly the usual Firebirds, GTs, RAMs, but also a couple 300Cs, one actually doing drag races. I don't recall his times, except he went 160kph over the quarter mile line afaik.

It got me a bit hyped up so I was looking for what the possibilities are for our SRT (in my case a 05 Roadster with 55k km).

Some shops here have a Stage 2 chiptune giving 380HP with 485Nm (https://www.procartuning.nl/chiptuni...-6-335-pk.html ). Thats only the ECU. If I would also add or only mod the intake with a DCAI from needswings, thats also quite a boost.

Anyone more info? The info is quite scatered on this website. Dragtimes have some records of stock cars doing 12 or 11 second drags, which is quite fast. Jim seems to have made 10s with a different engine afaik.


__________________________________________________ __________________________________________________ _______________

First of all.

you cannot expect 380 hp just with a tune.

most of the srt6, slk+c32 amg`s are between 330 - 350 stock bone.

you can expect a realistic 15 hp with just a tune.

i would go with tune, 65mm pulley and K&N fillters. you do not need the Needswings or SL55 dcai. With the listed mods +35 -40 hp and much more torque than stock. don`t trust the tuner numbers.. do a initial dyno and a dyno after mods.

Steven

Berlin Germany.

Re: Expected performance with mods
 

[QUOTE=No2fast;921962]

Re: Expected performance wirh mods
 

Hi da55id! So the crossovers (imf) add up 15 horses? Still issues with AFR?

Re: Expected performance wirh mods
 

I’m estimating my results. I still need to get the crossovers dyno tested. I had to get the sl55 fuel pump and now it pulls like crazy. I know that’s not scientific LOL. I will do the dyno sometime this spring and post thr results.

Re: Expected performance wirh mods
 

How about Kleeman tune? This is what i got back:

----
We have Boost kit and cams + LSD for the rear axle.

32-K1: Boost kit, consisting of a revised ECU software and a redesigned crank pulley. Up to 404 HP and 500 Nm (370 lb-ft) of torque.

€ 1695,00



+ a set of super sport camshafts. Up to 425 HP and 530 Nm (415 lb-ft) of torque.

€ 1795,00

Prices excl. 25% VAT and shipping/install
------

They do say "up to" and without the intake i suppose it wont really get that much, aside from that its not the power on the wheels... I think?

Re: Expected performance wirh mods
 

They have got to be talking about a SRT6 engine.

Re: Expected performance wirh mods
 

Its for the m112k, so i guess

Re: Expected performance wirh mods
 

yea, M112 = 3.2 liter, k = Kompressor

Re: Expected performance wirh mods
 

1 year later, and I am sitting here with a 390HP on the crank, 330HP on the wheels, 500Nm torque. Running on RON 98 E5.

Needswings DCAI, PSK, Oil Catch Can
Eurocharged TCU, ECU, 65mm supercharger pulley

I feel like the current limiting factor would be the exhaust and/or intercooler temp (still have to built in the splitter and bigger rad). These are all original. Thoughts?

Re: Expected performance wirh mods
 

:) A JATO pack mounted in the hatch? (it's a joke, don't be offended!)… :)


.

Re: Expected performance wirh mods
 

Check the length of your serpentine belt if it's not new. Stock is 114.5 inches. When I replaced mine it had stretched to 117 inches. After replacement it made a huge "seat of the pants" difference. Cheap - easy. The dyno I did which had all of your mods showed 340 wheel hp, so you're right there. I added the Needswings crossover ported manifolds since the last dyno test so I don't know what they might have added (if anything?). I note that there is no info on dyno testing for these crossover manifolds on Needswing's site. Wish there was.

You are probably at the point where you will need to ensure good fuel flow - at least that's what has happened to my SRT. Opening up exhaust flow at this point might just make A/F ratio worse - adding air, but not fuel. I added an SL55 fuel pump to make sure the engine was getting all it could with the standard injectors. Once done, my A/Fuel ratio normalized. Once you get to where you are HP wise, it's likely that the best mod you could add is a Limited Slip Differential. Horsepower that can't be delivered to the pavement is worse than useless. It made a HUGE beneficial difference in my car. Expensive, but zero regrets.

Re: Expected performance wirh mods
 

Hey De55id, thanks for your post. I had replaced the belt with the green one, the moment i got the PSK (option when you buy it), so it shouldnt be stretched yet.
An LSD is an interesting mod. Do you think the standard is not capable of keeping the wheels straight with so much power on the regular diff?
A new fuelpump should be doable. Any tools to figure out if the fuel ratio is OK (through obd for example)?

Thanks

Re: Expected performance wirh mods
 

you can get the short term and long term fuel trims from the OBD
They are handy in determining if you are consistently running rich or lean.