When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Put up a boost curve. 5AT or 6MT and which turbo kit? You should not have lag to 5k with GT28s... Full boost on JWT 700bbs by 3.5k or so on street, but on dyno my 5AT would not peak until 4.5k rpms because TC would not lock until then.
I have the gtm twin hr turbo kit ,and its a 6mt trans gtm did the install and dynoed it, Sam showed me the tune and all look very good , i dont have a graph to post up , i wish i did .but lag for the power to kick in really sucks the gt28rs turbos have the .86 hot sides
Should not have lag on those. Maybe a leak on either cold side or exhaust side causing extra time to build pressure. Twin gt30 setups spool sooner than 5k