JET_XR Member 24 Member For: 12y 5m 26d Posted 07/07/12 10:33 AM Share Posted 07/07/12 10:33 AM I'm trying to gather information to compare these two turbos but they are very similar. Both turbos are proven but the Garrett more so on XR6's than the precision. From what I can tell the GTX comes standard with a 4inch turbine outlet whereas the Precision would need to be optioned up; irrelevant really. What would you buy and why? Link to comment Share on other sites More sharing options...
dalts Member 755 Member For: 18y 6m Gender: Male Location: brisbane Posted 07/07/12 09:26 PM Share Posted 07/07/12 09:26 PM Ask qik1 he swapped turbos(garrett to the precision) and made more power without touching the tune! Both are great turbos,garretts are very popular here and precisions are used on the top turbo cars in the states. 1 Link to comment Share on other sites More sharing options...
XR6menace BANNED Banned 1,462 Member For: 17y 6m 29d Gender: Not Telling Location: banned Posted 08/07/12 08:35 AM Share Posted 08/07/12 08:35 AM Definately be talking to ya Lee in the next few months mate Link to comment Share on other sites More sharing options...
Nubbs Member 39 Member For: 14y 2m 19d Gender: Male Posted 19/07/12 05:23 AM Share Posted 19/07/12 05:23 AM I was weighing up these 2 turbos aswell, so I asked my tuner about it (I'm no expert) and he told me that he's had cars with basicly identical setups, the difference being the turbo (gtx42 vs precision) and on the drag strip, the Garret wouldn't come on boost untill the car had left the line, whereas the the precision could build about 10psi on the stall. He only ever uses precisions on his cars now Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 17y 9m 19d Gender: Male Location: SW Sydney Posted 19/07/12 06:38 AM Share Posted 19/07/12 06:38 AM I've also seen alot of good things from Precision - the big stand out is a 600+rwkw S13 still running a 2L bottom end. Response is extremely good with the Precision units Link to comment Share on other sites More sharing options...
WHITER33 Member 25 Member For: 13y 8m 20d Posted 13/08/12 12:15 PM Share Posted 13/08/12 12:15 PM Ask qik1 he swapped turbos(garrett to the precision) and made more power without touching the tune! Both are great turbos,garretts are very popular here and precisions are used on the top turbo cars in the states.Is there any dyno sheets to overlap the 2 to compare diferences..? Link to comment Share on other sites More sharing options...
XYZ Donating Members 1,171 Member For: 15y 2m 9d Posted 13/08/12 01:54 PM Share Posted 13/08/12 01:54 PM Yeah, check out QIK1's thread in the 600 section.. Same tune both runs before the input shaft snapped.. However, looks like the precision was more responsive before the gear box went bang Link to comment Share on other sites More sharing options...
nikofgxr6t Bronze Donating Members 284 Member For: 13y 10m 4d Gender: Male Posted 13/08/12 08:43 PM Share Posted 13/08/12 08:43 PM I went through this a while ago was gonna go a GTX4508R but then Kyle from 6 boost recommended me a Precision 8285 which makes about 50hp more and the size of the turbo is the same as a GT42 so piping won’t be a bitch to do like the gtx45 so I thought I will give it a crack. 1 Link to comment Share on other sites More sharing options...
qik1 Silver Donating Members 2,720 Member For: 16y 6m 16d Gender: Male Location: Loitering in SEQ Posted 14/08/12 08:09 AM Share Posted 14/08/12 08:09 AM My experience with back to back runs isn't really that accurate due to the box breaking first run with the new unit in place. What did happen though is the gtx made 988rwhp on roughly 33psi (with the fueling no where near correct due still to testing) the next run with the precision without changeing a single thing in the tune including boost cycle it made 40 psi which in turn made the car make 935rwhp at only 4000rpm where the input shaft went fck that im goooone & snapped lol.We did do a little test the otherday because we are looking at racing it soon & only on gate pressure (still running in box & engine) which is 14psi just quickly on the foot brake & not sitting there building it up it made 5psi straight up on the line. that's with cams & a dlm manifold which neither would normally help lowend boost. Basically it means its a more efficient turbo low & top end compared to the gtx. I can only speak from my experience but im converted 1 Link to comment Share on other sites More sharing options...
RSWEPN Donating Member Donating Members 187 Member For: 18y 1m 1d Gender: Male Location: Sydney Posted 14/08/12 10:38 AM Share Posted 14/08/12 10:38 AM I haven't tested against a precision, but the GTX turbos are amazing.I just went from a GT42 to a GTX4508 and the GTX comes on alot quicker/harder and makes alot more power down low. I'll post a graph of the difference between the 2 some time next week once I visit my tuner again. 3 Link to comment Share on other sites More sharing options...
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