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LTX and LSXPutting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.
Alright got new coil harness on runs very good now also seemed to get the coolant leak fixed for now. Have the exhaust all buttoned up fired it up today man what a let down its way to quite like only a notch or two above stock so much for being a race exhaust.
A few small updates first some good news. I got it down on the ground seems to move around fine clutch works very good. Shout out to QwkTrip for some tuning help with the holley efi the IEA change made a big difference.
Now for the issues my holley efi isn't self learning at all at the moment worked fine on my last motor but found a few things to try to get it working. If that still fails I'm going to have to start fresh with a new start up tune. This other issue I'm not happy about at all I put in a new viper spec input shaft from AMP distributing and it makes so much noise you would think I have some monster blower under the hood or a nasty set of gear drives
Ok been on the road for awhile now just getting some miles on her. The top end is crazy powerful power comes in very hard at 5,000. Going for my dyno tune tomorrow not sure what to think far as numbers just hope to make it there and back in one piece!
Then came time for me to put some fresh paint down! I went with a semi gloss black not perfect but nicer then it was. Also would like to add this was my first time painting a car. C7 brake kit up front.
Last edited by obeymybird; 02-20-2020 at 06:38 PM.
I have been setting up the suspension at the same time i was working on everything else getting ready for my first autocross at the new UMI race track! Went with koni yellows on all 4s UMI front weight jacks 850lb and there 200lb rear springs. Also put in there torque arm and rear lower control arms with watts link. New wheels where on the list as well 18x10s just some cheap jnc wheels for now with RSRR 595 tires.
I got to park my car for the winter in one piece first time in so long. Now i have been gathering LS7 parts for over the past year or so and just about had everything from intake to oil pan but just sold my ls7 block cause im going to go with a new TSP resleeved 427 block. Will be going with Race Proven Motorsports head and cam package it has been proven so many times I just have to give them a shot plus they work on more ls7 cars then anyone in the country. Also the stock bottom end c6 z06 record holder has this package as well. A old ls7 block pic and new monster twin disk waiting.
Last edited by obeymybird; 02-20-2020 at 06:33 PM.
Was going to get planted brackets but they need work to have the seats sit level so I bought the ebay knock offs which are 100% planted knock offs and had them modified to fit the car and seats right.
Do you make house calls? LOL! I think I could use your advice.
I can try to help I know you have been fighting with your car killing tires lol. My dad use to race circle track and if something isnt set up perfect then we dont stop wrenching till its right on the money.
Guess I could add that the hooker dual exhaust didnt sound to hot so I cut out the mufflers and swapped in 5th gen camaro borla atak for a much better driving experience.
Not much of a update block is ordered sounds like it will be around a 6 week wait.
New exhaust valves came today just need a few more odds and ends for parts also need to send my heads out to AI for work yet.
I swapped the intank pump last summer from a 255 to the aeromotive 340 still on the vette filter/reg combo and all is fine so the question is there any reason why this won't hold up with the new 427?
Last edited by obeymybird; 04-15-2020 at 10:35 PM.
I swapped the intake pump last summer from a 255 to the aeromotive 340 still on the vette filter/reg combo and all is fine so the question is there any reason why this won't hold up with the new 427?
Yes and no. Lots of people on ls1tech have failure issues with the C5 regulator at high horsepower. Others have no issue.
How many quarts does that Moroso pan hold? The kick-outs are a slick idea. I've been considering going to a high volume pump but would need a larger sump like the fabricated pans have.
Noticed that you used a washer as the 2nd hold down for the oil pick-up tube. Guessing the washer is only loaded on the one side? If so, then I would highly discourage that. It's not a structural washer and the joint most certainly will relax and the bolt could fall out. I'm not a bolted joint "expert" per say, but I have easy access to a true expert that has taught me a few things, and I've done a few bolted joint analysis in my time. Improved Racing sells a hold-down bracket that provides a full, flat surface for the bolt head to clamp against.
7qt pan part #20143 went with there matching pick-up tube and windage tray everything fit perfect. The extra hold down came from saccitycorvette the washer is stepped to fit just right.
I cut a few corners to save a few bucks on this cause im not out to set any hp records. Im staying with the factory intake for now be a simple upgrade later if need be. Stock balancer is staying really would have liked to put on the ATI unit but just wasnt in the cards. The PRC heads look killer but there isnt much of any dyno numbers to back up there work on top of that I only went with a clean up pass on them and glad I did cause pistons were .011 out of the hole. Going to keep my exhaust so we will get to see what a dual 2.5 setup can do with a 427. If everything keeps going forward hope to be on the dyno within 4 weeks any hp guesses? Also trying to talk myself into the magnum f upgrade now with a much needed 3.5" driveshaft
7qt pan part #20143 went with there matching pick-up tube and windage tray everything fit perfect. The extra hold down came from saccitycorvette the washer is stepped to fit just right.
That is slick. Glad to see that the new build is coming along so well! I just went through this whole thread and I think this is the first customer install of the holley trans crossmember that I've seen. Those were a long way out when I did my swap, how do you like it? The one I have, the exhaust goes under and unless the road is very smooth/flat it scrapes everywhere, especially if you have a passenger. Also, do you have to have the matching engine mounts?
Edit, would also love to get a magnum F, but way too much for me for what is an unneeded change.
That is slick. Glad to see that the new build is coming along so well! I just went through this whole thread and I think this is the first customer install of the holley trans crossmember that I've seen. Those were a long way out when I did my swap, how do you like it? The one I have, the exhaust goes under and unless the road is very smooth/flat it scrapes everywhere, especially if you have a passenger. Also, do you have to have the matching engine mounts?
Edit, would also love to get a magnum F, but way too much for me for what is an unneeded change.
Yep I have there motor mounts and the trans crossmember has been great keeps the exhaust tucked up so good never bottomed out or scraped yet but my car is pretty stiff.
So remind me what we're dealing with. 5.3 427 short block, B3 cam, PRC 265 heads, stock LS7 intake, and dual 2.5" exhaust?
Yep with blackheart 1 7/8 headers. I have seen many ls7 vettes crack 600whp with a stock intake with the b3 cam and AI heads but they also come with 2.75 inch dual exhaust stock. Im thinking 580whp but this is a tricky guess dont forget my clutch is worth some extra hp about 20whp over a ls7 factory clutch.
I wanted rpm to tune my car but they only do newer stuff now but told me to take my car here to K.P. tuning
The B3 cam makes power. Let us know how it goes. Be good to see this build in the new LS swap dyno sticky too.
Your last engine made more than most people could, so I have a feeling you'll get some good numbers again.
And a few pics of the oil pan looks like a winner has a touch more clearance then my old custom pan. Also don’t forget this is with Hooker motor/Trans mounts so might have different clearance with other mounts.
06-21-2017, 04:09 PM
