February 19, 2025, 03:42:37 PM

Author Topic: UK RHD LS1 8.8 FD Gunnytron's build thread  (Read 252034 times)

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #195 on: May 04, 2014, 01:33:26 PM »
British engineering at it finest, lol.

« Last Edit: December 09, 2017, 02:31:15 PM by Gunnytron »
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline quinns

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #196 on: May 04, 2014, 06:08:16 PM »
I'd add a bars on the top that go back up top similar to ronins. Well it wouldn't be similar it would be practically the same thing. Closer to where the subframe is bolted solid to the car so the area of the subframe that spans between the mounting points isn't taking all the load.
1993 Rx-7 Base LS3 TR6060 Ronin 8.8
1997.5 Hummer H1
2006 Hummer H2 SUT

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #197 on: May 04, 2014, 06:31:59 PM »
Yep, that's exactly what I am going to do. I just wanted to get the main frame sorted first.
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #198 on: May 05, 2014, 04:32:15 PM »
Fuel tank straps, brake line splitter, random bracket and rear ARB mounts after a soaking in rust remover and wire wheeling.



And after a coating of rust converter before I paint them
« Last Edit: December 09, 2017, 02:30:41 PM by Gunnytron »
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #199 on: May 10, 2014, 05:52:18 AM »
Presents!

« Last Edit: December 09, 2017, 02:32:02 PM by Gunnytron »
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline bimbleuk

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #200 on: May 10, 2014, 10:03:31 AM »
I spy an adjustable push rod? I just received one myself to verify the rods I'm using. They were supplied as a kit and I did a rough check to verify by adjusting the rocker bolts recently but I'm paranoid so best checked with the adjustable rod.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #201 on: May 10, 2014, 10:23:29 AM »
I spy an adjustable push rod? I just received one myself to verify the rods I'm using. They were supplied as a kit and I did a rough check to verify by adjusting the rocker bolts recently but I'm paranoid so best checked with the adjustable rod.

Well spotted :)

How's your tune going?
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline bimbleuk

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #202 on: May 10, 2014, 03:16:59 PM »

Well spotted :)

How's your tune going?


I've had it running for a few weeks and mapped the part throttle stuff fairly easily on the road after spending quite a while balancing all the throttle linkages etc. I initially tried to stay Speed Density (retaining the MAP sensor) assuming that Alpha-N (throttle and RPM only) would make it a pig to setup. I was wrong as it's been fine and now actually idles and drives better with the mildly lumpy cam than ever before! I can now see why you can run very extreme cams with ITBs and not have the stutters and surges of a single plenum.

The ECU still references MAP for live corrections so it's not some highly strung race car. Cold starts require a tiny push on the throttle for say 30 secs as theirs no idle control valve but after that it's solid. I've not changed the factory settings so maybe it just needs more time playing.

I spent a couple of hours on a dyno Friday populating the high RPM cells but we were struggling with wheel speed and grip on the aging dyno but it's at least safe to boot it and hold it under power. So I'll be out early tomorrow doing some doing 3rd & 4th gear runs to correct the areas we've deliberately over fuelled. Not saying it's perfect as I'm still learning about the fuel dynamics and injector timing tables but it's 90% there now at least.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #203 on: May 10, 2014, 03:50:49 PM »
Nice (well the bits I understood) :)

Looking forward to a vid on your build thread.
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #204 on: May 18, 2014, 05:32:04 PM »
Spent alot of time in the garage this weekend. THere was no news on my rear subframe mount so I bit the bullet and put the rear subframe and suspension all back on so I could pull the car out and work on the engine.

I swapped my cam out and fitted all new seals and timing chain. Cleaned the sump out and fitted the boss for the ATI balancer.

I didn't get the chance to use the pushrod checker.








Glad I ordered a new chain as the old one was the thinner style.


Cleaned out the oil pump and smoothed out the rough edges on the entry and exit ports.






« Last Edit: December 09, 2017, 02:52:33 PM by Gunnytron »
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline bimbleuk

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #205 on: May 19, 2014, 04:40:06 AM »
Hmmm nice rockers!

That reminds me I must order a new chain and swap it out when I fit the sump upgrades. Good time to mod the oil pump housing too.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #206 on: May 19, 2014, 07:08:56 AM »
Hmmm nice rockers!

That reminds me I must order a new chain and swap it out when I fit the sump upgrades. Good time to mod the oil pump housing too.

It's a pity the rockers are covered up. Would be nice to have them on show.
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #207 on: June 01, 2014, 11:27:52 AM »
Rear subframe all ready for welding. The new shape leaves plenty of clearance and I shouldn't have to relocate anything except maybe the charcoal canister.

« Last Edit: December 09, 2017, 02:54:38 PM by Gunnytron »
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline Gunnytron

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #208 on: June 22, 2014, 08:54:14 AM »
All welded and ready for paint.


I shot blasted and repaint my rear ARB (couldn't get a decent pick).

I am now in the throws of removing the rust from the seams of the fuel tank. Very boring job. Also giving the brake cylinder a spruce up.
« Last Edit: December 09, 2017, 02:55:11 PM by Gunnytron »
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline bimbleuk

Re: UK RHD LS1 8.8 FD Gunnytron's build thread
« Reply #209 on: June 23, 2014, 05:18:12 AM »
Good to see the progress.

Can you make another :) I have a spare frame and after that recent event I think my original diff is starting to show some stress! I have a spare diff with new bearings but I think I may be pushing the limits on the Mazda diffs.

I did use the rod checker at the weekend and that indicates one size down from the current 7.4 to 7.375 would be ideal. Not sure if that's worth changing but as I'm probably going to order some gaskets, chain and a trunion upgrade I may as well get a set of rods.