March 14, 2025, 07:51:49 PM

Author Topic: 403 LS2 FD - LS7 Build for 2020!  (Read 278712 times)

Offline kinger

Re: 403 LS2 FD - The ol' 2 year update
« Reply #645 on: November 25, 2019, 01:01:42 PM »
I’m all about trying different things but why go through all the trouble for the itb’s.  Not worth all the work involved, especially when it’s possible to make 650rwhp Na without them.  Just my opinion.


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I wanted the WOT sound and idle quality.  Oh the extra 60+hp over a plastic intake wasn't bad either.  Also liked the tuning aspect of changing runner length to find what feels best. 
93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline MPbdy

Re: 403 LS2 FD - The ol' 2 year update
« Reply #646 on: December 31, 2019, 06:06:07 PM »
Gum it up and run it :)

So that's what I did and it is working great lol.  Some fuel tank repair epoxy and it is back on the road.

I must say every time I open the garage at my new condo and I see the FD sitting there I get a little fluttery in the chest.  It is a beautiful sight both literally and figuratively.  It is nice to have the flexibility to take it out whenever I want vs having to commit to driving it as my only car for extended periods of time.


Offline MPbdy

Re: 403 LS2 FD - The ol' 2 year update
« Reply #647 on: December 31, 2019, 06:23:44 PM »
So some cool shit happened on Christmas.  We had all the family over as usual, and we put the Uncles and cousins to work to help my dad and I lift the body off my Grandpa's Fiat Altered drag car.  This is the original family race car, and we're working on getting the safety certs up to date so we can run it again.  It was in the NHRA museum for over a decade and we got it back out a couple years ago. 







Buncha old fogeys lol.  I asked my dad almost 10 years ago now to get the thing out of the museum so I could win a race with "Pops" on the starting line.  Grandma wasn't big on the idea...but when there was risk of losing ownership in the car due to changing museum ownership we took it out.  CAN'T STOP US NOWWWWWW

We also got a puppy.  This is Minnie Mac.  She's cute as shit, but man puppies are terrible.


Offline wickedrx7

Re: 403 LS2 FD - The ol' 2 year update
« Reply #648 on: December 31, 2019, 06:34:21 PM »
Gum it up and run it :)

So that's what I did and it is working great lol.  Some fuel tank repair epoxy and it is back on the road.

I must say every time I open the garage at my new condo and I see the FD sitting there I get a little fluttery in the chest.  It is a beautiful sight both literally and figuratively.  It is nice to have the flexibility to take it out whenever I want vs having to commit to driving it as my only car for extended periods of time.



Get that washer and dryer out of you garage. There is no room for that! Car looks great BTW.

1993 Touring, 2012 L99, T-56, Ronnin 8.8, Ohlins, Speedhut, Samberg and lots of custom parts
Build Thread - http://www.norotors.com/index.php?topic=19354.0
Pictures - www.flikr.com/wickedrx7

Offline kinger

Re: 403 LS2 FD - The ol' 2 year update
« Reply #649 on: January 01, 2020, 10:48:40 AM »
Gum it up and run it :)

So that's what I did and it is working great lol.  Some fuel tank repair epoxy and it is back on the road.

I must say every time I open the garage at my new condo and I see the FD sitting there I get a little fluttery in the chest.  It is a beautiful sight both literally and figuratively.  It is nice to have the flexibility to take it out whenever I want vs having to commit to driving it as my only car for extended periods of time.



That worked for mine too!  Love the car only thing better then my black FD is your white one!  Sick!! Happy New Year! 

Looking forward to a detailed write up of your ls7 build! Not that I want to copy it or anything [emoji6]


Sent from my iPhone using Tapatalk
93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline Cobranut

Re: 403 LS2 FD - The ol' 2 year update
« Reply #650 on: January 01, 2020, 11:48:28 AM »
That Fiat is one NICE vintage altered.
Should be loads of fun, and quick, at vintage drag meets.
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline digitalsolo

Re: 403 LS2 FD - The ol' 2 year update
« Reply #651 on: January 01, 2020, 11:51:56 AM »
+1  That altered looks like fun.   Probably scary as crap to drive, but fun!
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...
2007 Aston Martin V8 Vantage - Gen V LT4/TR6060, upper/lower pullies, headers, tune.
2021 Tesla Model 3 Performance - Stock...ish.

Offline MPbdy

Re: 403 LS2 FD - The ol' 2 year update
« Reply #652 on: January 02, 2020, 01:47:50 PM »
Glad you guys dig the Fiat!  It has an old best of 8.60 at about 151mph.  The intake runners and exhaust primaries have always been way too long, and the mechanical fuel injection has never been leaned out.  It would lay over on the top end and try to flip over on the starting line. 

My dad thinks he can get it to about an 8.30 pass as it sits, which is just a crate LS7 454 big block with the mechanical fuel injection on top running on alcohol.

The plan is to build a blown LS motor for it and run the vintage 7.60 index class with it where altereds and slingshots run no electronics, limited engine tech etc off a pro tree and a breakout at 7.60.

Center steer and no front brakes will make it quite the ride.  It does have a significant level of sketch about it.  I think the wheelbase is only 96" lol. 

Offline MPbdy

Re: 403 LS2 FD - The ol' 2 year update
« Reply #653 on: January 02, 2020, 07:42:23 PM »
Gum it up and run it :)

So that's what I did and it is working great lol.  Some fuel tank repair epoxy and it is back on the road.

I must say every time I open the garage at my new condo and I see the FD sitting there I get a little fluttery in the chest.  It is a beautiful sight both literally and figuratively.  It is nice to have the flexibility to take it out whenever I want vs having to commit to driving it as my only car for extended periods of time.


That worked for mine too!  Love the car only thing better then my black FD is your white one!  Sick!! Happy New Year! 

Looking forward to a detailed write up of your ls7 build! Not that I want to copy it or anything [emoji6]

Sent from my iPhone using Tapatalk

Happy New Year man!

...is it time to start posting engine details??  :yay:

May of 2018 I purchased a low mile LS7 shortblock.  The previous owner of it was going to build a track car out of this C6, but came across a built 440 short block for a steal and so he didn't need it.

The thing was crated up and freighted to my dad's work in Riverside.  Literally all I wanted was crank, rods, and the block.  I wound up also with pistons, timing set, oil pump drive, lifters and balancer all which just got pitched.

What I liked about this short block is that a legitimate racer and car builder was going to use it for his own race car, and it had also never been disassembled.  Yes, sometimes it is nice to see what is inside...but it is also nice to know that it hasn't been f'ed with and have a backstory.

After I unpacked it this is what I was looking at.  Description was pretty much on point.  A couple cylinders had some marks that needed to be honed out, but I wanted to put forged pistons in it anyway so no harm no foul.



I've been around some really neat engine builds before, but as far as LS engines go the LS7 has always been a dream.  This engine build in itself is kind of like its own project.  I get a little giddy working on this thing.  I was hyped as a mofo when the LS7 came out originally.
 
Getting the engine built will be done first.  This is something that I expect *maybe* to eventually install into the car - I do have a plan for that - but I also fully expect to take back out and put it in something more racey like the Fiat, maybe a 67 Nova street car with a lot of chassis work done to it, or a drag car I buy/build for myself one day.  It is going to be extremely rowdy.  This is a race engine that might go into a street car.  No illusions of it being anything else. 

I fully expect to drive it one block in California and get arrested.

Good news is whatever is done to the FD to make the LS7 work will just make the car better in the long run.  List of big ticket items - new front end package including air intake, vented hood, radiator, oil cooler, and oiling system (dry sump for sure).  New dual 3" stainless exhaust. It is getting driveshaft shop pro level axles.  It's getting a RPS carbon clutch.  I'll fix the trans reverse issue, and leaking shifter.  It is getting a Holley standalone ECU (huge deal).  I'll fix the fuel slosh issue.  I might give the brakes an overhaul and put 18's on it but as usual that is at the bottom of the list. 

This will either be the eventual swan song final form for the car before I finally move on in life, or it'll be a hell of a foundation for the next decade of ownership.  So far I really have no desire to get rid of this thing.

I set out on this idiotic journey so that I can go 200 mph in one standing mile, and I am pretty sure that maybe it will definitely happen.

My other goal that I want to work toward is to be able to reliably and purposefully use the performance of the vehicle for indefinite periods of time.  I want it to feel robust and capable, not like a glass cannon.  It is pretty good right now with a major weakness in thermal management - brakes and engine.  To that point, I want it to feel engineered and purposeful like an OEM supercar and not cobbled and built in a garage.  With the absurd power of the LS7 I'm not sure if that is truly possible in a streetable vehicle, but with whatever engine winds up in it the chassis should be ready for a nice ~500-600 horsepower powerplant.

Engine porn and progress pics coming next :)

Offline MPbdy

Re: 403 LS2 FD - LS7 Build for 2020!
« Reply #654 on: January 02, 2020, 07:46:55 PM »
The engine is going to be a stock crank and rods LS7 with forged pistons, ported heads, and a huge solid roller camshaft.  Everything in the list below I actually have and am working on putting together.  Things I don't yet have are the Holley system and the dry sump, but I'll get there.

429" LS7 build
LS7 Block honed to 4.130"
LS7 crank polished and checked
Factory Ti rods in good condition and ARP bolts
Mahle PowerPak flat top pistons with 1/1/2 mm ring pack
BES 285cc ported LS7 heads, new factory Ti valves and Ferrea stainless exhaust
Comp Cams 258/272 .775/.756" lift 113 LSA +3* advance
Isky Red Zone bushed solid lifters
T&D steel pedestal mount adjustable roller tip 1.8 rockers
PAC 1238x solid roller valve spring kit
Holley Sniper low profile intake w/ Holley 105 throttle body
IGN-1A smart coils
Meziere electric water pump
Spoolin' 1 7/8" merge collector headers
Siemens Deka 60 lb/hr injectors

I plan on trying to run as close to 13.5:1 compression as possible.  If I don't change anything from where I'm at, it'd be 12:1.  I need to check my piston to valve clearance to know how much more I can cut off the heads.

At 13.5:1 through the Holley I expect to make somewhere around 760 actual horsepower, and am hoping to peak at about 7400, and run it out to 7800-8000 rpm.

7800 rpm in 5th gear is the magic 200 mph number.



Offline digitalsolo

Re: 403 LS2 FD - LS7 Build for 2020!
« Reply #655 on: January 02, 2020, 09:50:14 PM »
That's one hell of a camshaft, sir.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...
2007 Aston Martin V8 Vantage - Gen V LT4/TR6060, upper/lower pullies, headers, tune.
2021 Tesla Model 3 Performance - Stock...ish.

Offline MPbdy

Re: 403 LS2 FD - LS7 Build for 2020!
« Reply #656 on: January 02, 2020, 09:58:33 PM »
That's one hell of a camshaft, sir.

Yes it is!

Billy Godbold from Comp was kind enough to spend some time helping me spec it. These are new low shock solid roller lobes he’s developed and very passionate about. Nice to feel I’m getting the latest and greatest from one of the best of all time.

It takes a lot of duration to make a 4” stroke engine get to 8000 rpm!

Offline paul_3rdgen

Re: 403 LS2 FD - LS7 Build for 2020!
« Reply #657 on: January 02, 2020, 10:02:59 PM »
I like where your headed with this!  Educate me, why solid roller? better for higher rpms? Couldn’t a good hydraulic roller work for this application? 


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93 RX7 R1 500rwhp
LS2, H/C combo... ARE drysump
Race Logic traction Control and 4 wheel Stoptech BBK
3.73 gears installed in the stock diff  :o

Offline MPbdy

Re: 403 LS2 FD - LS7 Build for 2020!
« Reply #658 on: January 02, 2020, 11:18:33 PM »
I like where your headed with this!  Educate me, why solid roller? better for higher rpms? Couldn’t a good hydraulic roller work for this application? 


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So I’d say yes and no. Hydraulics can do great things, but solid rollers are just the ultimate uncompromising performance. I’ve run our hydraulic motors up to 7700 rpm.

Modern solid roller lobes are much nicer on parts these days and are plenty reasonable to run on the street. The main drawback now is just cost vs reliability/maintenance. This’ll be my first in an LS motor. It should be quite snappy lol.

There’s significant power gains, responsiveness and better valve control with the solid roller.

Offline wickedrx7

Re: 403 LS2 FD - LS7 Build for 2020!
« Reply #659 on: January 03, 2020, 08:32:17 AM »
This sounds like it will be a great build!

1993 Touring, 2012 L99, T-56, Ronnin 8.8, Ohlins, Speedhut, Samberg and lots of custom parts
Build Thread - http://www.norotors.com/index.php?topic=19354.0
Pictures - www.flikr.com/wickedrx7