F1BHP

I have purchased a set of SL65 Turbos which I am doing a billet wheel upgrade on, I will get them back in a couple of weeks.

Does anybody know if the 65 Turbos are a direct swap for the 600 Turbos?

I know the compressor wheel is larger but I am not sure if the housing and manifolds will be a direct fit.

Any help would be appreciated so I can preempt any potential issues.

Thericker

If just swapping/adding 65 turbs/mani's to 600 car? Yes it's a direct swap plug n' play, everything on exterior is the same. Only dif is larger comp wheels as you already noted..

F1BHP

Thx for the info Thericker

gwelliott

Hi F1,


I'm assuming you bought a used set of turbos off a Sl600 and you're having the compressor side reworked.....is that about right?


If so, where are you having the work done? The only place I've seen offering the enlarged compressor housing is Speeddriven, but their offering seems a bit pricing.


Is there another option?


Thanks in advance

Thericker

You know what they say about assuming? Yes using a 600 turbo (much cheapeer) would def be the way to go lol...Seriously tho..

Eurocharged & Speedriven offer the upgrade, but it's not worth the price of admission once you total in the price of reworked turbos $1500-2k per side + removal & install (Between $4000-$4500 just to remove/install) reality you gain 50-55 whp @ the most on a 600 engine & 45-50 on 65 engine.. So even using the highest gain 55 whp your paying up to $6500.00-$7000.00 & possibly more depending on the shop for just 55 rwhp again not remotely worth it as the MAJORITY of this powers only seen in the upper rpm range for about 1500-2000 rpm's a total joke as far as hp gains go towards money spent.. There are far better mods out there to spend your hard earned $$ on

Edit:Forgot this mod = 2 sides IE $1500-$2k X2 = $3000-$4,000.00 added to install etc = Roughly $7,000.00-$8,000.00 installed for 45-55 whp for 1500-2k RPM's insert 8000 laughing smileys here..

gwelliott

Apologies, but I'm new to the board (just purchased my Sl600 a weeks ago), but come with about 15 years experience tuning and upgrading the Supra 2JZ-GTE engine. Making power on the Supra was always pretty easy. Bigger turbos, better fuel delivery, boost control and unrestricted exhaust allowed one to make some serious power (600 - 700 RWHP) without investing a fortune.

ECU/TCU tune aside which is obvious........what would be the top 3 power adders if not bigger turbos?

From trolling the forum there is debate about the utility of downpipes (faster throttle response, but little net HP gain), I've read the intake is a restriction to more HP, but besides the Renntech CF is there another option or does better intercooling give the biggest bang for the buck?

In the Supra community they had it down to a science. You knew almost down to +/- 5 HP what a given mod was going to give you gains. Is that kind of info generally available and I'm just not looking in the right place?

F1BHP

Hey gwelliott, I have purchased a set of SL65 Turbos which come with a larger compressor wheel as standard, this cost me $1k. To rework the Turbos with a larger billet turbine wheel was $750 each side including balancing. To remove and replace the Turbos is $1,500.

So all in it is $4k plus taxes, I do agree that that money can be better spent on other mods, however in my case the mod list left to do is very short which is why I am going down this route.

Very few people are modding the V12 so a check list with BHP numbers is not available.

Cooling is the best place to start along with the ECU/TCU tune. I noticed a big difference in grip with a Quaife LSD installed but obviously no power gain. Try to drop some weight including light wheels and brakes. A full stainless exhaust would drop some pounds and also add a few BHP.

Let us know what you decide to do and good luck with it.

gwelliott

I appreciate the info.....an LSD came standard on the MKIV Supra and literally worth its wait in gold to put power to the pavement. That was my first purchase and it was delivered last Thursday. I hope to install in the next week or two.

Who did the billet rework and balancing on your SL65 turbos? I agree that you can buy a set off car-parts.com for $1500-sh, so if I can get the rework done for another $1500, that is not too expensive to pick up another 50+ HP.

Can you post a before and after dyno run?....very curious in the gains you will see.

P.S. I get to the UK once or twice a year and have a colleague that won't stop talking about how fast his (stock) M6........I would be eternally grateful if we could hook-up and shut him up once and for all.

F1BHP

Turbo Dynamics in the UK are doing the work. I doubt you can get a set of Turbos for that money as the turbos and manifolds are together and are north of $5k new. You would need to look at used items.

I unfortunetly don't have a good base for the before Dyno numbers as I was having other issues the last time it was done, however I will post the after numbers once done in a few weeks.

Where is your friend based, I am always up for a race.

Thericker

No harm meant Welcome to the boards... PS you're forgetting the removal/install @ $4500 add that to the above, & in your case you havn't bought the additonal set so this price goes up an additional $1500-$2k for a used set/pair = $9-$10,000.00 for 50 whp. Again this isn't like other mods ECU etc, the power you gain in these bigger Comp wheels is mostly, ONLY seen in the last 1500-2k RPM's

Thericker

Exactly The only place you'll find them is Ebay, & look on botht regular Ebay & Ebay UK, they have a much, much, larger selection & they Ship to the US

Thericker

Not trying to argue etc.. But as far as your pricing quotes, they differ widely from what I found in the US, EC & Speedriven both charge roughly the same to rework the turbs, it isn't JUST adding larger Comp wheel either. Both Co's rebuild the Turbs entirely & EC, actually increase the Diam of Turbo inlet piping by about 1/2 " inch the cost is roughly $1500 PER SIDE.. Install @ ANY MB dealer is $4500 an Indy shop will do it for $3500..... The used Turbs sell on Ebay for between $700-$1000 per side

EC doesn't list this info on their site, but I've called them & they told me what I've stated above..

I thought Speedriven was cheaper or possibly both EC/Speedriven raised pricing. Here's the latest off Speedrivens web site..
http://speedriven.wpengine.com/600-series-biturbo-v12/ Basically $2500 PER SIDE, not $1500 per side.. Ouch!
so it gets a lot MORE expensive than I thought.. This leaves someone who hasn't bought a used set to a grand total to do this mod @ $11-$12,000.00 for 50 whp for only 1500-2k RPM's ouch...

Not true, Speedriven & EC actually rebuild the ENTIRE Turbo vs what you've had done, you only got the larger billet wheels added. EC also redoes the air inlet neck that feeds the turbs LARGER by 1/2" inch increasing airflow supposedly. It should work tho EC's dyno gains didn't show much more than 40-45 whp on the 65's once I separated all the gains from their other mods (EC refused to just show a Dyno using just their larger turbs as they know the gains were meek @ best & they added ECU/tcu etc etc to the POST turbo work)

F1BHP

It seems that going to a turbo specialist is the way to go as EC and Speedriven send the turbos of to get done. My pricing is actual, I am not just writing numbers.

At Turbo Dynamics that is all they do and the pricing is good.

As far as the install, the first time it cost me $1,250 to remove and put back. This time it is $1,500 as I am doing it in the London area which always seems to be more.

I will find out if the cost is worth it soon. I am keeping my fingers crossed.

Thericker

What you're paying in London has NO bearing on what we're paying for removal/install in the US.. Yes going directly to a Turbo shop is cheaper when just replacing the Comp wheels, EC/Spdrvn are doing much more than that as I already noted.. Believe it or not

Spdrvn/EC & about half a dozen more tuners/board members have posted Dyno/gains seen after adding JUST bigger comp wheels many, many, times you are far from the 1st to attempt or complete this modification. Gains are indeed mostly in the last 1500-2k RPM's & vary between 40-45 whp for 65's & 50-55 whp on 600's (if shown properly w/OUT ANY other mods post turbo work)

F1BHP

Agreed, I am just posting my experience, on my mods of the Turbos so it can be taken however you like.

maziar2000

Do you know how big the original compressor wheel is compared to the upgrade, exducer/inducer and maximum flow rates? Or which compressor wheel is used for the boring out and swap?