Im looking to uprade my Turbo\'s and im interested in how the performance of the car will change.
I believe Gurj is running a T88, how did this effect low down speed, and do you lose traction when the big turbo kicks in?
Ive also noticed the twin turbo upgrade on rx7store which includes 2 T28\'s. I was led to believe that on the stock configuration the turbo\'s ran at different times, the bigger one when you get to 5\'000rpm etc... So how would 2 T28\'s work?
What are your opinions on this as im about to spend out big time after Rotorstock persuading me i need more power!
regards.
Just remember all the other bits youll have to do to go single. Fuel system, ECU, etc and theres no point in doing it if you dont get it mapped properly too.
Lee
Yep ive got that covered, its gonna be pricey, but ultimately worth it.
Ive just gotta decide how big a turbo :)
it probably means a nearly new GruppeM Filter Charger will be for sale though :(
I guess it depends on the final use or power goal.
T04e or T04s or GT35/40 seem popular for decent response and circa 400bhp, spooling by around 3500rpm.
T88s are hooge!
Yeah, thats what i need to figure out. If i want descent power from a T04 or wether a T88 is driveable.
Im gonna want to run the quarter mile, but also use it everyday if i have to.
I like the idea of having the huge power when i need it at the touch of a button, but to run an everyday hp of about 300.
Really i want a quick spooling but big power turbo/turbo\'s. Has anyone uprated to bigger twin turbo\'s?
QuoteOriginally posted by MintyFresh
Ive also noticed the twin turbo upgrade on rx7store which includes 2 T28\'s. I was led to believe that on the stock configuration the turbo\'s ran at different times, the bigger one when you get to 5\'000rpm etc... So how would 2 T28\'s work?
The (stock) rx7 does use a sequential setup but both turbos are the same size. I\'m not sure exactly how this works (too technical for me!) but I assume it allows the boost to run for longer into the revs where a single small turbo would have run out of puff.
Uprated twins would be my preference but going single simplifies life under the bonnet and removes some of the headaches caused by the sequential set-up.
My understanding from some of the big singles is that they spool up by 3500 rpm for the more expensive snails so not to odifferent from the stock ones.
Iain
If it was me, I wouldnt bother thinking about a single unless I wanted more than 400bhp.
If you dont want that much, its a lot of money to gain very little.
i know its possible to push the standard turbo\'s to around 350bhp, but this must drastically reduce their lifespan?
Maybe so, but your going to be pumping the same power into your engine too with a bigger turbo. It might be slightly better from a bigger turbo, but its not gonna last as long.
how much of an improvement is 2 T28\'s over the standard turbo\'s?
If you\'re on about big singles or after market no-seq twins - and big power - I\'d seriously think about getting it rebuilt - ported and dowelled - before you bother sticking T88s or twin 28s on it. To realise the power those setups are capable of you want to run lots of boost. A stock motor wont give u the sterngth or breathing.
Bare in mind also that a T88 isnt going to be spooling til like 5500rpm then is going to hit u in the back like a shovel.
I would do a LOT of thinking b 4 u fall into a money pit like the one you are describing...
I would go for a good hardy rebuild first, or run more boost on the stockers, poo them and then go for rebuild, turbo(s) etc etc etc etc etc etc etc etc etc. You are talking LOTS of money here to go from the set up u currently have. Fuel, intake, turbos, management, exhaust, tuning, installation, brakes, suspension etc....
Do some research. Then do a lot more :)
Good luck , let us know how things go. And good decision on not selling her - even if u r about to let her make u bankrupt :rollin
QuoteOriginally posted by MintyFresh
how much of an improvement is 2 T28\'s over the standard turbo\'s?
Totally different ball game!
Twin 28s are a non-seq kit, akin top the turbo setup on G11ARYs black car.
QuoteOriginally posted by 20B_boy
Twin 28s are a non-seq kit, akin top the turbo setup on G11ARYs black car.
I thought G11RY\'s black car was running some sort of bespoke one turbo per rotor and one exhaust system per rotor set-up?
Ok, so what would peolple say is realisticly possible without upgrading the turbo\'s?
So we are talking ecu, fuel system, intercooler etc...
without upgrading the engine and turbos you mean
yeah, just with add-ons
I think John is running 314rwbhp
thats about as high as anyones gone
I am running 290
QuoteOriginally posted by peace2make
I thought G11ARY\'s black car was running some sort of bespoke one turbo per rotor and one exhaust system per rotor set-up?
Yep? The twin T28 kit is individual exhaust manifold runner per rotor to each turbo, and individual dump pipes to a collector just before the cat. Gary has a different exhaust that meets then sepeartes again into 2 back boxes.
Essentially the same set up...
Im definately going to ditch the stock turbo\'s, but im not sure what for yet.
Does anyone know if the 2 T28\'s kit on Rx7store.net comes with everything to fit? The kits about $5000 and i would hope for this you get everything to get it working (barring intercooler etc...).
Also, does anyone know what a Greddy TD06 is capable of producing?
If you are looking at Ebay be VERY careful what turbo kits you buy
Turbo kits seem to be the most popluar scam item at the moment
Minty, i have had a lot of converstions with Ross @ Dragon about singles, running the stock turbo\'s in parrallel etc etc. As i ultimately want to go the single route or something non stock anyway. Even with buying second hand gear it would be cheaper to buy one already done, as everyone has said, intercooler, fuelling, ecu etc etc. You will probably need to add the price of the turbo kit agin to your total costs, if you do it properly that is. I am no expert on this but have found the forum and Dragon to be a wealth of information and knowledge to my advantage. Give Ross a call or one of the other tuners and they will help you out with costs etc, just as an example after a chat with Ross the other day, a second hand turbo kit, intercooler etc etc would be around £5k or so fitted. I know you probably want to make your own build that is unique to you but cars like Ants single and others advertised make sense money wise imho and then put your own touch\'s to the interior or exterior as you have done with your present car.
Ok, i understand your points, and before this thread goes on and on about the benifits and disadvantages of twin/single etc... i have one final question.
What do people think of the Blitz KKK kits? Is anyone running one, or know of anyone who is?
Thanks all.
Hi Minty, i dont know of anyone running one of those but if you are buying from the states be sure the kit fits rhd, the manifold is the problem, they obviously do not have the steering coloumn on the turbo side over there.
Minty, im running Blitz KKK kit. As far as driving and performance is concern, im more then happy with it. All the other setup is uprated as well.
I really dont know much technical stuff but this single turbo car is allot diff then a twin one i had. No problems so far(touch wood) eating M3, scooby and carrera\'s any time:D :D even with running on almost flywheel, got new 1 on the way.
cheers
Laeeq
not sure how the porting etc affects overall bhp but my mods at the moment are still not at their potential and i\'m confident of running 350 soon
Tuning, porting and exhaust a/r housing all play a big part on lag.
I have a to4r with small exhaust a/r housing. I have very little lag. My car boosts low down literally like a twin turbo but doesn\'t run out of puff up top either. Best of both worlds so to speak.
368 rwhp semi tuned.
rgds
Sorry didn\'t see your thread till now mate,
Yes i\'m running a single turbo, currently a T78 these do produce a lot of power and if you are not careful alot of trouble with handling as its a huge kick when it comes in.
Day to day running it at low boost of 0.62 at which it makes 342bhp (adequate), when on high boost it makes 460bhp - but does require a remap after which i\'m hoping for close to 500bhp.
Made the 342bhp running at 0.7PSI of boost at hubs not rolling road so more accurate (apparantly) will be going on sat to have a dyno run at high boost so we will know exactly whats being produced and how the fueling is.
On driving when in high boost the car will wheel spin in 1/ 2/ 3 gears so in the wet NO chance, even in the dry its all over the place.
Give Ross a ring at Dragon performance as my car is from there, and Ross is currently running a T88.
//www.dragonperformance.co.uk
Gurj
Accuracy of rollers over hub dyno is a big debate :)
Hub dyno gives higher readings tho, in the case of Dyno Dyanimcs v Dynapak at least. A good 5-7% or so from the results of a few cars that have done \'back to back\' runs on the 2 setups.
Where r u going on the dyno Gurj? the car is being mapped there rather than just doing power run(s)?
Finally, can we have a sweep stake on what power the car makes after all this time? :rollin
To get the full potential out of the turbo i need a remap, the dyno day is at Thor.
Hopefully depending on how much of a slot i have might see if they can quickly map it there, potentially a big hp figure.
Last time out i had a leaking radiator and was not comfortable with full boost run so only ran it at 0.7PSI and made 342BHP at 7200rpm at 251 ft/torque.
Which is adequate but must seek full potential otherwise its a waste having the T78 no?? now have replaced radiator with a huge aluminium rad so we\'ll see.
I think power figures are somewhat overrated now and most people wanna know what the 1/4 time is?? but hopefully in the near future can answer both.
Rgds
Gurj
Good luck mate, hope it all goes well, look forward to graphs and time slips soon :)
When you off to the see the one they call Pip then mate?
Si
PS is it a particular event at Thor or you going on yer todd?
Si,
Need to see pip soon but finding it diffecult to make time as pip\'s not available on the weekends, the Dyno day at thor is a skyline event but as i know Dave i\'ve jumped the que to be the first one on!!!, plus mines the easiest to do as only got to tahe 2 wheels off!!!