79 RX7 LS 5.3 Turbo. (8.93 @ 153mph)
10-30-2016, 07:11 PM
#463
Originally I just had 2 metal strips with washers inbetween like this, but they had more flex than I was comfortable with.
I boxed/welded the crap out of them to strengthen them up. Then added gussets to the original bracket. They are pretty dang strong now!
Went to the track last night and blew my trans up 2 seconds into the first pass...The new turbo was making some power I guess... popped right at 21lbs.
I boxed/welded the crap out of them to strengthen them up. Then added gussets to the original bracket. They are pretty dang strong now!
Went to the track last night and blew my trans up 2 seconds into the first pass...The new turbo was making some power I guess... popped right at 21lbs.
11-14-2016, 10:23 PM
#465
Ug I've done this too many times. Car was already jacked up with the driveshaft removed. but I think I set a personal record and had the trans out in a little under an hour.
Did a good job on it. Took it to my trans guys house today and we took it apart. Said he has never seen someone strip every tooth off. And he's been building transmissions for 20+ years :encouragement:
Everything else looked good though. Going with a set of aftermarket 1.80 gears. Hope they hold up. Trans guy said he never used this brand, but the gears looked really beefy.
http://www.ebay.com/itm/151567991668?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Did a good job on it. Took it to my trans guys house today and we took it apart. Said he has never seen someone strip every tooth off. And he's been building transmissions for 20+ years :encouragement:
Everything else looked good though. Going with a set of aftermarket 1.80 gears. Hope they hold up. Trans guy said he never used this brand, but the gears looked really beefy.
http://www.ebay.com/itm/151567991668?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
11-18-2016, 09:40 PM
#467
I am guessing the racing is OVER this year now. Seeing how the temp dropped ~25* today. LOL, I am just ~4hrs from you. Actually, KCIR stayed open later than Gateway this year, glad you got a last hit in, even though it took out the trans, at least now you have a fresh trans to start the year off with, not one that goes out on the first day out. I try to find the positive in everything. LOL ;-)
12-20-2016, 12:55 PM
#468
Trans is back together and installed. Later found the tail housing was cracked as well, so installed a new one.
I went to install the driveshaft and the slip yolk wouldn't slide on past 3 inches or so. Couldn't get in in the trans far enough to install the drive shaft. I pulled it out to inspect and the splines were twisted! It was a cast spicer yoke. I'm wondering if this is what took the trans out. Since the drive shaft had no way to move, i'm sure thats what ate the tail housing anyway.
Spare yoke slid on and off the output shaft easy. So I ordered this $140 forged steel Sonnax yoke. Still only a 27 spline, hope it holds up!
Also found out when it's -17 degrees outside and you heat the yoke up with a torch... the cups slide in by hand!
Neat tip... after the cups fall off the third time... I found this little trick works well.
I went to install the driveshaft and the slip yolk wouldn't slide on past 3 inches or so. Couldn't get in in the trans far enough to install the drive shaft. I pulled it out to inspect and the splines were twisted! It was a cast spicer yoke. I'm wondering if this is what took the trans out. Since the drive shaft had no way to move, i'm sure thats what ate the tail housing anyway.
Spare yoke slid on and off the output shaft easy. So I ordered this $140 forged steel Sonnax yoke. Still only a 27 spline, hope it holds up!
Also found out when it's -17 degrees outside and you heat the yoke up with a torch... the cups slide in by hand!
Neat tip... after the cups fall off the third time... I found this little trick works well.
03-02-2017, 01:43 PM
#469
Dropped the new trans in, de-winterized, road tested and had the car all ready for opening day Mar 11th.
Then found out a friend was selling his LSX block later this year, and another friend wanted my 370. So I pulled the 370 to help fund the LSX build. And in the meantime I happen to have this gen4 4.8 sitting here doing nothing. So I’ll drop that in and see how the VSR S480 does on it in the meantime.
Yanked the 370 and sent it to a good home.
Here is the 2007 4.8. Picked it up off Craigslist for $500. Had a claimed 12k miles on it and was a roll over U-haul truck pull out.
Pulled the pistons and the top rings were super tight, around .015. Opened up to .022 “ish” and dropped them back in. Lower rings were all at around .024 and I didn’t touch them. Bearings all looked new.
Found a killer deal on some Summit 1.8 roller rockers and a 216/222 @ 111 .56X lift cam. We’ll see how the 4.8 likes that.
On a side note I found the cheapie reusable coffee filters work great to strain fuel and oil. Think I gave under $3 for it at our grocery store. Strained the oil as I drained it on the 370 to look for metal. Also use one on my fuel cell when I dump gas in since I don’t run a filter pre-pump.
Then found out a friend was selling his LSX block later this year, and another friend wanted my 370. So I pulled the 370 to help fund the LSX build. And in the meantime I happen to have this gen4 4.8 sitting here doing nothing. So I’ll drop that in and see how the VSR S480 does on it in the meantime.
Yanked the 370 and sent it to a good home.
Here is the 2007 4.8. Picked it up off Craigslist for $500. Had a claimed 12k miles on it and was a roll over U-haul truck pull out.
Pulled the pistons and the top rings were super tight, around .015. Opened up to .022 “ish” and dropped them back in. Lower rings were all at around .024 and I didn’t touch them. Bearings all looked new.
Found a killer deal on some Summit 1.8 roller rockers and a 216/222 @ 111 .56X lift cam. We’ll see how the 4.8 likes that.
On a side note I found the cheapie reusable coffee filters work great to strain fuel and oil. Think I gave under $3 for it at our grocery store. Strained the oil as I drained it on the 370 to look for metal. Also use one on my fuel cell when I dump gas in since I don’t run a filter pre-pump.
03-02-2017, 02:06 PM
#472
I’m not sure how long this one will hold up, but so far it doesn’t appear to be melting.
Looks like the SS filters can be had on amazon for about $5. I’m sure they would hold up well. Would be cool to mount on your fuel cell fill area permanently.
Yup! Don't believe they offer a cast wheel?
Looks like the SS filters can be had on amazon for about $5. I’m sure they would hold up well. Would be cool to mount on your fuel cell fill area permanently.
03-02-2017, 02:40 PM
#474
It won’t perform well with this tight converter and 3.25 gearing I’m sure. Hoping it will squeak out high 8’s.
Only have 1 shift with the glide and won’t be anywhere near 7500 thru the traps with a 3.25 gear. Even with a 275 tire I’d be upper 170’s by 7k. Been looking for a gear set. Thinking a 3.90 would be great. No idea when this thing will peak out HP wise. I haven’t seen an LS6 manifold pull much past 7k.
Only have 1 shift with the glide and won’t be anywhere near 7500 thru the traps with a 3.25 gear. Even with a 275 tire I’d be upper 170’s by 7k. Been looking for a gear set. Thinking a 3.90 would be great. No idea when this thing will peak out HP wise. I haven’t seen an LS6 manifold pull much past 7k.
03-03-2017, 10:53 AM
#478
Have you seen Capizzi’s SBE 5.3 mustang revving over 8k for a season with tear down at the end? I can’t believe it’s surviving at that RPM but it seemed fine when they pulled it apart. (factory rockers/lifters) If that’s the case I’d think the 4.8 would be fine at whatever I’m thru the traps at on a 3.90. If 7800rpm on a 28” tire is 167 without any slip figured in. I figure I’d be lucky to hit 156 or so with this setup and I usually see under 4% slip with this converter.
03-03-2017, 02:56 PM
#479
LS1Tech Co-Founder
iTrader: (34)
Yes I have, I actually stopped by his house at Xmas and checked out the car since we are friends. Great car. I love builds like his and yours, that's my next project.
He runs 3.73 gear with 275/60 tires shifting around 8K, trapped 17x.
He runs 3.73 gear with 275/60 tires shifting around 8K, trapped 17x.