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.
St. Jude Donor '07-'08-'09-'10-'11-'12'-'13-'14-'15
Originally Posted by Hotwire25
Any word on what these produce power wise?
claims regarding power increases have been pretty optimistic in my opinion. There are some sheets showing approximately 25whp/25wtq gains for imported LT5 TBs.
my take is that gains are not from the TB per say but rather the retune after the TB and the extra air provides by these larger units
Cajun, is the inlet hole on the stock LT1 intake manifold big enough for the LT5 throttle body to work?
I guess what I'm asking is whether an intake manifold upgrade is required to work with the LT5 TB?
You have to have the billet plate to bolt it up onto the intake the it will work fine no tune is needed for it to work for you. But to get the full bang down the road after per say a few more mods I would have a tune on the car..
You have to have the billet plate to bolt it up onto the intake the it will work fine no tune is needed for it to work for you. But to get the full bang down the road after per say a few more mods I would have a tune on the car..
So is the hole on the OEM LT1 intake manifold is greater than 95mm? Or does the billet plate taper down the diameter?
So is the hole on the OEM LT1 intake manifold is greater than 95mm? Or does the billet plate taper down the diameter?
No the lt1 intake hole that the T.B. bolt onto is bigger then the plate on the T.B. that opens up & moves. Really you are good with that billet plate the only reason you need that is the bolt pattern is bigger on the lt5 T.B. Robert
I just measured the internal diameter of the LT1 OEM intake manifold at 87mm. So surely bolting on a 95mm TB is totally pointless? Or am i missing something...?
I just measured the internal diameter of the LT1 OEM intake manifold at 87mm. So surely bolting on a 95mm TB is totally pointless? Or am i missing something...?
I know these don't hit anyplace think of it like this 95 mm to 87 mm but you have a motor that is sucking in the air so it will not get like bottle neck to the point of it is not getting more air to help on power. I have known Cajun for a long time now don't know of him ever telling me something that he didn't do, plus I have gotten & spent some big bucks with him over the years. I have one of these 95 on my car & I can tell a diff in the paddle feel of the car for sure. All of my stuff has been ported intake on the runners & the mouth also to what mm I cant tell you but it does look diff from a stock intake for sure.... Robert
Last edited by robert miller; 10-05-2018 at 03:14 PM.
I know these don't hit anyplace think of it like this 95 mm to 87 mm but you have a motor that is sucking in the air so it will not get like bottle neck to the point of it is not getting more air to help on power. I have known Cajun for a long time now don't know of him ever telling me something that he didn't do, plus I have gotten & spent some big bucks with him over the years. I have one of these 95 on my car & I can tell a diff in the paddle feel of the car for sure. Robert
So really the main benefit of it is probably pedal feel? Looking at the pictures on Cajuns website I can see where the intake manifold hole is smaller than the adapter plate hole (see arrow in image below). It just strikes me as weird that we go to a lot of trouble to port throttle bodies and remove any sharp angles that may disrupt airflow. Yet, this is a 4mm lip the entire circumference of the inlet?
St. Jude Donor '07-'08-'09-'10-'11-'12'-'13-'14-'15
Those are not our pictures they are from ICT Billet to show adapter plate. We recommend our ported MSD intake for LT1 and our ported snout with LT4 to match the 95mm TB
Those are not our pictures they are from ICT Billet to show adapter plate. We recommend our ported MSD intake for LT1 and our ported snout with LT4 to match the 95mm TB
Gotcha. So a similar deal to going with a 103mm TB, but tuning not totally necessary for a 95mm?
Gotcha. So a similar deal to going with a 103mm TB, but tuning not totally necessary for a 95mm?
The 103 T.B. is one big PITA to tune & will not run at all on any LS or LT motor without being tuned. If you look in here a few guys have pulled them off & selling them due to running correct & getting a tuner to get them to really run correct thur all RPM range.. WOT is not to bad at all but diving it around town diving is the hard part..
Turns out now seeing a few people like pray performance doing dyno comparison on the 103mm yo the 95mm that’s ported and the 95 comes out on top for hp and torque over the nick williams 103mm. It’s only about 5-9 ho and 12-15 lbs torque but the big thing is the price if you just go buy the 95mm from GM parts direct for 210 bucks then clean it up your self or run it as is and make about the same hp as the 103mm for 300 and change less. I was the one who did this on my zl1 back when no one even had a part number for them yet. I got lucky and came across on of the very first to be sold so it’s been on my zl1 in various forms now since the zr1 first showed up. Don’t know my whp but 9.72@141 on a heavy zl1 speaks for itself on a bolt on only car. So I’m am big proponent for the 95mm no matter who’s you buy it’s a better throttle body then the billet one.
St. Jude Donor '07-'08-'09-'10-'11-'12'-'13-'14-'15
Originally Posted by HorsePower Junkie
Any benefit just bolting on an unported 95mm onto a bone stock LT1? (using the adapter of course)
.
Nope, in fact it would cause issues since intake mouth is smaller than the TB. Also its overkill for a stock or bolt on car. You will lose low and mid range TQ
08-22-2018, 07:22 AM
