IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: Scoobum on August 02 2011, 08:24:01 AM
-
Curiosity has finally gotten the better of me. I sold off a set of Centerlines collecting dust and some Buick junk...and put together enuf cash to order a 6262 journal bearing billet turbo with the S housing and .63 exhaust housing. Precision claims a 3000 convertor is a perfect match (AC 16930 NL 3000 in my car)...so let's see how it compares to the 70 P trim with the .63 Garrett exhaust housing I currently have on the car. I'm gonna order Erics new 5.7 chip. If I've read correctly...hi s 5.7 alky chip brings the 1-2 timing in faster. I'm hoping the turbo shows up late next week...as I'm up here in Canada...so shipping takes a little longer. Let's see if these billet turbos live up to the hype.
-
they do spool with less converter.
-
I rate the spool of a turbo by the distance travelled from a dead wholeshot until the boost gage breaks 0 psi.My Ta61 with the same 16930 n/l converter breaks 0 psi boost in roughly 12 feet.I have an RJC graiger valve which is cranked all the way down.I also have a stock cam and my compression is at 8.55:1.Just a point of reference.
-
With regard to spool up, I consider it to be the time it takes the turbo to reach full boost after I launch the car. Not all turbos are linear in spool. Some, will take longer to make the first 10 psi than they do the next 15. Others will have an almost linear acceleration ramp. It is a bit difficult to define what is ideal as it will depend upon the power level being generated and the ability of the tires to transfer it to the ground. In the end, whatever is meaningful on the car works :)
-
New turbo is here...so I'm gonna bolt it on here at the house in the morning...and then drive it to the shop to port the wastegate hole. The half hour drive to the shop will give Erics new 5.7 chip a chance to learn. I'm gonna flog it at an abandoned airport strip next weekend to log some runs on PL and make some 02 adjustments.
-
good!
-
Is there an event at the airport strip or can you just drive in & beat the snot out of the car? That sounds like fun!
-
Let us know how it works!
-
I will Chris...timesl ips and PL logs. I've read some wild claims about this turbo...now let's see what it does in the real world. I'm skeptical.
-
it is a good turbo...but, I doubt it will live up to the hype....gotta hype stuff to get people to replace what they already have. Magic always sells
-
All bolted down...with zero exhaust leaks. Let it sit in the driveway and idle for awhile to allow for Erics chip to learn. A quick shower...and then off to the shop to port the wastegate hole. I`ll say one thing for Eric...he`s accurate. Fans kicked on at exactly 168 via the SM.
-
First impressions of the 6262. This thing spools fast...real fast. I'd say Precision is spot on recommending a 3000 convertor. Engaged the line lock...warmed up the back tires...put it against the footbrake...an d got 10 PSI of boost in just under 3 seconds. I got out to the shop last nite...but there was rain moving in...so I couldn't get the porting done. I turned around and headed for home. I leaned into it and brought the boost up to 12 PSI and it pulled clean and hard with no KR. I'm off Friday, so I'll get the porting done then. Saturday I'm off to the airport to get the boost dialed in...max I'm gonna run is 22. I had Eric set the 02's for 22 PSI...so I'll get an ET with the default setting and one with the WOT 02's pulled down to 770-780. I'll post the results.
-
Have fun!!!
-
Don't worry...we will. Got a friend with a supercharged F 150 going out with me.
-
I would be interested in seeing a universal set of criteria to rate some of these new turbos,ie; the use of the compressor map for numerical analysis but also some standardized tests for confirmation.S ome folks are not sold on the new wheel design and machining capability vs the old wheels and the correct tweeks and or synergy of parts.The new wheels just by virtue of the math,materials and processes involved are superior to the old cast wheels,but by how much.Does the benefit of the superior new wheel actually benefit every situation? This is a situation which is specific to the car and the usage involved.Patri ck wanted to see a 6262 in my car (I have a 3000 n/l Ac 16930) yet I don't have a forged bottom end to take advantage of the "new" capability.My synergy of parts will spool what I currently have just as quick (if not faster so I am told) as the the new wheel.The work inside the turbine hsg got me another 45cfm above the 900cfm rating (about 30 hp=6152e) but with a robust spool.Sorry to babble on.There are other things yet to be done in my own case.Just food for thought perhaps.
-
I don't many will disagree with you. Sometimes this stuff is touted to be nearly magical, but, without compressor maps, etc., one has a difficult time in evaluating the situation.
I am too old, and too cynical, but, I think there is way too much hype and not enough facts. Being combination dependent means that only a few may really see any gain over their current hardware. The 6262 is the current magical bullet. I have had guys writing me that have completely stock drive trains and they want to know why their car does not run as well as it did with the stock turbo. Some vendor promised them that this was what they have to have.
It is amazing that with all the new units out there that are claimed to be superior replacement to the the TA49 usually do not...One has to proceed with caution :)
-
I've run several turbos over the years...stocke r...TA49...615 2...70...and now the 6262. All indications tell me this 6262 should be a blast at 22PSI. Having said that, I ran the TA49 years ago...but the car had the wrong convertor in it from the previous owner...and stalled out at 1700 RPM...and with the .85 housing on the 49...the best short time I could squeeze out of it was 2.2. I bracket raced the car for 2 years with it...and it went a consistent 13.0 at 112 mph at 24 PSI. I have video of the car...and you can see it do absolutely nothing for several hundred feet...and then would squat its ass...and take off. I've always wondered what it would have done ET wise if it had of been matched up with the proper convertor. Sooner or later a customer is gonna walk in the shop saying they don`t want their 44 or 49...and Dusty Bradford will be getting a call a short time later with me asking him to spec one of his race convertors for me. Mark...you`re gonna be incredibly happy with your 49.
-
One day, it will fire!!!
-
Most have not exploited their combos well,or perhaps at all.I have saved a lot of old tests from days of yore,and folks were running 10's with an abacus (stock computer) and bronze spear (60-1 compressor wheel).Combination,addressing the entire system and attention to detail get the timeslip.Peopl e spend gobs of money on this years "darling injector" or turbo and don't progress.There are lots of mods and tricks to make the car fly but you may not hear them from the vendors.My good friend Steve Yaklin used to say "cubic dollars are better than cubic inches"and for most this is true,but not for all.
-
Steve is one of my good friends as well. I learned a lot from him.