Tommy V
Well-Known Member
- Joined
- Jul 24, 2014
- Threads
- 72
- Messages
- 3,653
- Reaction score
- 601
- Location
- Brookly park Md
- First Name
- Tommy
- Vehicle(s)
- 2015 race red gt pp manual, recaros, 401al DOA "too much boost on 93", 2017 GT Auto
This is just my opinion,but i.did a lot of testing with the d1 on both my cars,one motor gone.Tuning with my new auto i went to a 4.88 pulley.First with the 4.75 pulley i was reaching 15 psi of boost at 7300 rpm and it was still climbing,fast!!!.Me and Jon could not get my car not to knock or pull a shit load of timing once my car reached over 6200 rpms.Again this was on 93,good 93.It got to the point that if i was going to run a 93 tune on the 4.75 I would have about 14 degrees of timing max.Lund does not even want to tune a d1 with a 4.75 on 93,and if they do it's with allot of grief.Even with 93 and Octanium i had a hard time not getting any knock after 18 degrees of timing,and guys this was not false knock I have over a hundred logs with the d1.To determine this after me and Jon getting into arguments,he gave a tune commanding 10 degrees of timing letting the knock sensors add only if happy.Well it added 15 degrees and that was it,even then after 7200 rpm it started to pull A small amount of timing.This is why procharger will not tune the d1's.Jon said they did their own testing with the d1 and after 6k rpms it starts coming on fast.So I'm running the 4.88 pulley now and just finished my fuel system for e85.Also this was with no cats,I have a video of how fast the boost came up with that 4.75 pulley and it was scary.What risk, you'll be fine to get a base line on with your setup Looks like we are basically twins (D1/4.75). I ended up disconnecting the wastgate and and going back to the 4.75 after my last dyno. [MENTION=15779]z06psi[/MENTION] is running a smaller pulley than both of us on 93 btw. I made 633/556 prior to the Boss manifold swap; it nose dived at 6500 on stock...still need to go back to get a base line before I go e85...which will be soon!
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