Cheap supercharger kit: Part III
04-18-2014, 09:10 AM
#1
Cheap supercharger kit: Part III Just finished this build, so I figured I would share
For those that havent seen them, here are some of my previous builds. All focused on the fun of the build, not some mega power number. This one is no different
The M90 5.3 build
https://ls1tech.com/forums/forced-in...arger-kit.html
The M122 6.0 build
https://ls1tech.com/forums/forced-in...t-part-ii.html
Now, on to the new SC. I ran across a killer deal on one of these
Thats a Techco: a short lived modular SC design. Shame the company went belly up so soon, it was a heck of a design. At its core there is a 3.0L twin screw blowing through a pair of intercoolers. Its a very compact unit, being only 2" taller than a factory LS1 intake. I picked it up cheap from the stigma from dismal numbers on the only TWO people on corvetteforum to try it and the company having gone bust. Apparently out of warranty is a big deal. Not for me and it was too cool to pass up
My L92 topped LQ4 stepped right up for the build. First I have to build a new accessory drive because most of the pieces didnt come with the kit. Only the SC and a handful of 8 rib pulleys. The SC was on the corvette spacing and I didnt have and corvette FEAD systems laying around, so I built one rather than buy. Fbody FEAD systems fit the chassis best, so I decided to emulate that
I ended up using JY parts for the system, because the SC ate a big chunk of my budget. Thats a $15 S10 alt, $20 Northstar PS pump and a $25 LS9 idler pulley I found on ebay
Next, I had to make a new neck for the TB to mount to as the original neck pushed the TB right into the radiator. The SC inlet was 3.502" where a SCH40 alum tube is just a few thousandths bigger. Im not sure where mandrel bent SCH40 tubing can be found, so I pie sliced it on a chop saw and cut new mounting flanges on the CNC router at work. The final design became more of an S than a L
Into the car we go! Original plans were to build a tub to draw fresh air in the powerbulge hood cowl
The stock tensioner bracket had a funny routing around the water neck with some pretty lame belt wrap, so I built a new one. I wasnt too confident the stock corvette tensioner would do much to fight belt slip, but its holding up so far. Belt slip seemed more related to bracket flex than lack of tension. The balancer is an off-the-shelf 8 rib powerbond for corvettes. $200 PB vs $500 IW
I built a tank for the intercooler coolant as the supplied bottle was barely a quart. The supplied heat exchanger is massive, so keeping cool should be no trouble. It had a magnacharger sticker on it. Not sure of the PO switched to a magnachered and didnt feel like swapping HX or if magnacharger supplied them with HX
I built new solid motor stands for extra clearance on the chassis. I like the stand deign because its a snap to reach all the bolts and gives tons of room
Switched the 4L80E for a Tick lvl 2 T56 and built a 31sp 8.8 to finish out the running gear. Decided to try a tunnel mounted TA and like it so far. Wish I had simply welded the bracket to the axle instead of inventing a bolt on method
Off to the tuners
A second in-tank pump and dual nozzle methanol kit later and she was completed
Not bad considering the parts. Better cam, bigger headers, more cubes/compression, ported heads, bigger balancer pulley... this thing could really scream if I wanted it to. Makes you wonder what the corvetteforum guys were doing wrong... with LS3's no less
Thats a stock LQ4 short, not even rod bolts, stock L92 heads with 918 springs. The first rect port friendly cam I could come across, my old 1.75" SSW headers. Stock techco SC pulley, stock sized PB balancer pulley
14psi
Too bad there's only three of these SCs, I really like the design and look
For those that havent seen them, here are some of my previous builds. All focused on the fun of the build, not some mega power number. This one is no different
The M90 5.3 build
https://ls1tech.com/forums/forced-in...arger-kit.html
The M122 6.0 build
https://ls1tech.com/forums/forced-in...t-part-ii.html
Now, on to the new SC. I ran across a killer deal on one of these
Thats a Techco: a short lived modular SC design. Shame the company went belly up so soon, it was a heck of a design. At its core there is a 3.0L twin screw blowing through a pair of intercoolers. Its a very compact unit, being only 2" taller than a factory LS1 intake. I picked it up cheap from the stigma from dismal numbers on the only TWO people on corvetteforum to try it and the company having gone bust. Apparently out of warranty is a big deal. Not for me and it was too cool to pass up
My L92 topped LQ4 stepped right up for the build. First I have to build a new accessory drive because most of the pieces didnt come with the kit. Only the SC and a handful of 8 rib pulleys. The SC was on the corvette spacing and I didnt have and corvette FEAD systems laying around, so I built one rather than buy. Fbody FEAD systems fit the chassis best, so I decided to emulate that
I ended up using JY parts for the system, because the SC ate a big chunk of my budget. Thats a $15 S10 alt, $20 Northstar PS pump and a $25 LS9 idler pulley I found on ebay
Next, I had to make a new neck for the TB to mount to as the original neck pushed the TB right into the radiator. The SC inlet was 3.502" where a SCH40 alum tube is just a few thousandths bigger. Im not sure where mandrel bent SCH40 tubing can be found, so I pie sliced it on a chop saw and cut new mounting flanges on the CNC router at work. The final design became more of an S than a L
Into the car we go! Original plans were to build a tub to draw fresh air in the powerbulge hood cowl
The stock tensioner bracket had a funny routing around the water neck with some pretty lame belt wrap, so I built a new one. I wasnt too confident the stock corvette tensioner would do much to fight belt slip, but its holding up so far. Belt slip seemed more related to bracket flex than lack of tension. The balancer is an off-the-shelf 8 rib powerbond for corvettes. $200 PB vs $500 IW
I built a tank for the intercooler coolant as the supplied bottle was barely a quart. The supplied heat exchanger is massive, so keeping cool should be no trouble. It had a magnacharger sticker on it. Not sure of the PO switched to a magnachered and didnt feel like swapping HX or if magnacharger supplied them with HX
I built new solid motor stands for extra clearance on the chassis. I like the stand deign because its a snap to reach all the bolts and gives tons of room
Switched the 4L80E for a Tick lvl 2 T56 and built a 31sp 8.8 to finish out the running gear. Decided to try a tunnel mounted TA and like it so far. Wish I had simply welded the bracket to the axle instead of inventing a bolt on method
Off to the tuners
A second in-tank pump and dual nozzle methanol kit later and she was completed
Not bad considering the parts. Better cam, bigger headers, more cubes/compression, ported heads, bigger balancer pulley... this thing could really scream if I wanted it to. Makes you wonder what the corvetteforum guys were doing wrong... with LS3's no less
Thats a stock LQ4 short, not even rod bolts, stock L92 heads with 918 springs. The first rect port friendly cam I could come across, my old 1.75" SSW headers. Stock techco SC pulley, stock sized PB balancer pulley
14psi
Too bad there's only three of these SCs, I really like the design and look
04-18-2014, 02:44 PM
#4
TECH Junkie
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wow , awesome numbers . I want to see some more vids and hear the blower scream . I was wondering who you had tune it , glad to see you had a reputable place do it .
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04-20-2014, 10:08 AM
#8
I wish more SC companies would use a similar modular design. The SC itself, case, intercooler box and intercoolers are all the same for ALL Techco kits, regardless of application. Runners, TB neck and pulley snout are all that changed
Imagine if Whipple or Magnacharger did that
Imagine if Whipple or Magnacharger did that
04-20-2014, 10:42 PM
#11
This 8.8 has 3.73 gears. I think the combo would be better suited with 3.08 or 3.23 gears to get more use from 1st, 2nd and 3rd
RMA performance has a good pic of the blower and intercooler box opened up. The most I did was take the runners off. Not much to see there
RMA performance has a good pic of the blower and intercooler box opened up. The most I did was take the runners off. Not much to see there
05-13-2014, 08:41 PM
#13
05-17-2014, 12:53 PM
#20
My screen name is a shortened version of a high school nickname. Never read any of those books. Might check them out
Throttle body is an ebay 92mm. It needed a few minor tweaks to be perfect, but at 1/3 the cost of a name brand, I was sold
Throttle body is an ebay 92mm. It needed a few minor tweaks to be perfect, but at 1/3 the cost of a name brand, I was sold