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post #1 of 87 (permalink) Old 02-03-2018, 11:15 AM Thread Starter
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Modifications

I'm currently adding further modifications to my GXP. I've replaced the silicone turbo pipes with mandrel bent aluminum, put in a Performance Werks intercooler, Solo Mach Exhaust, GMPP tune and upgrades with both front and back cross-member stabilizers and .25" tunnel brace. I also put on a set of 18x8.5 wheels from Stern (before they went out of business) and had them powder-coated to match the silver of the front wind screen and M bar. It's shod with 18x255/35 rubber. I'm putting in Comp Cams stage II cams, Opel injectors, improved high pressure direct injection fuel pump and BC Racing Coilovers. Then it is off to Performance Werks up near Chicago to add a methanol injection system, large impeller turbo and blow-off valve and then have it tuned.

I've had the car since it was new as my wife had bought it for me as a birthday/Christmas present in 2007. I was born on Dec 23, 1946. My health had be keeping from working on my 1969 Opel GT project car and she bought it so I would have something to drive to shows and do solo and rally racing as well as attend car shows. It is Mean Yellow and has just over 46,000 miles.

Next year I plan on putting on some aero packages and removing all emblems. It will be painted Cadillac Black Diamond with all black intakes and splinters painted to match the silver around the front wind screen and M bar.

Have fun and wish me luck!
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post #2 of 87 (permalink) Old 02-03-2018, 12:54 PM
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Good luck, pics along the way would be

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Mr & Mrs ChopTop's 09 Fastback & 06 Vert Mods thread:https://www.solsticeforum.com/forum/f...session-75468/ Original join date; Oct 2005 under LowLife handle.
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post #3 of 87 (permalink) Old 02-21-2018, 03:14 PM
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Good luck with the upgrades! Are you running a manual tranny? If not then are you planning on beefing up the transmission to handle all those horse's you'll be pushing out?
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post #4 of 87 (permalink) Old 02-21-2018, 03:25 PM
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Originally Posted by Saveaux View Post
Good luck with the upgrades! Are you running a manual tranny? If not then are you planning on beefing up the transmission to handle all those horse's you'll be pushing out?
That turbo won't be any problem for the stock manual transmission provided it is shifted sensibly - I have the same set up.

I wasn't aware that Comp Cams was doing anything for the LNF - maybe you could post the specs - I'd be curious to see what they suggest.

FWIW, it is generally accepted practice to also upgrade the valve springs when you swap cams - not that you WILL use higher rpm - there is so much mid range there really isn't much need to buzz the engine, but one can inadvertently take it a bit high and the stiffer springs are a sensible protective measure.
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Current fleet:
1957 Jamaican bodied MGA
1958 MGA Twin Cam (race car)
1962 MGA Deluxe Coupe
1971 Jensen Interceptor
2009 Pontiac Solstice GXP Coupe
2007 BMW Z4M coupe
Recently departed: 1965 Jensen CV8, 1969 Lamborghini Islero S, 1988 Pontiac Fiero GT, 1969 MGC roadster
Mods at https://www.solsticeforum.com/forum/f...thread-102178/

Bill in BC
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post #5 of 87 (permalink) Old 02-22-2018, 10:17 PM
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Waiting on these “comp LNF cams”

Betting he meant ZZP cams
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Mods... LDK short block P werks tune, P werks CAI/ turbo inlet pipe, P werks hot & cold side piping, P werks rear suspension brace, Pwerks Valve springs, Pwerks intercooler, Pwerks phonelic spacers, Pwerks Hf cat, GM 3bar map sensors, Pwerks cross drilled / slotted rotors, Hawk HPS pads, Pwerks stainless steel break lines, Solo Street race exhaust, street edition headlights, DDM 6000K hids.
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post #6 of 87 (permalink) Old 02-23-2018, 08:11 AM
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For what it's worth a few years ago I was looking for a cam for my car .Comp Cams with whom I've dealt with in the past recommended getting the specs and have one custom ground . GM has one listed in their Performance parts book part #889 58648 but I've never found anyone who can get one . A few other vendors I talked to said basically what Comp told me that I would need to get one custom ground .ZZP is the only vendor who has a listing for Ecotec cams and components .they have 5 different ones listed .
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post #7 of 87 (permalink) Old 03-14-2018, 07:15 PM Thread Starter
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Cams

Yes, they are custom grinds from Comp Cams made for ZZP. I'll post spec later.

Randy
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post #8 of 87 (permalink) Old 04-28-2018, 05:05 PM Thread Starter
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Here are the specs for the cams, I'm sorry it took so long to get back online.

ZZPerformance Stage 2 Cams
224° int duration, 438" int lift
218° exh duration, 420" exh lift

Got the head off and it seems that the dealership never performed the recommended retightening of the turbo/manifold interface during regular service, so the unit was leaking and losing boost. I thought it was coking of the intakes. When we got the manifold off we found that the unit was cracked on the s divider which is common but the crack continued down towards the outer wall and climbed up to the flange surface and finally to the outer surface. The unit is toast and I was only able to locate 2 new on the shelf units in the states both in Texas. Hopefully it will be here on Monday. I will be sending it out to be port matched to the head, sent to be annealed and then have a ceramic coating applied. The turbo housing had the same issues so I called Performance AutoWerks. They can ship me a big wheel this coming week but if I want any of the other Turbos it will be a 6-8 week delay. Man that will cut into my driving for the summer. So I'm settling for the Big Wheel. I looked at getting a unit from ZZPerformance but it would require additional modifications as their units are made for the HHR and Sonic so are not a direct fit for the Kappa. Really don't want to mess with my Solo Exhaust setup and 3" CAT or the linkage for the wastegate.

Since everything is going to delay completion I've ordered an Oil Overflow unit from DDM to install.

Randy
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post #9 of 87 (permalink) Old 04-28-2018, 05:14 PM Thread Starter
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I looked up the performance cams from GM for the Ecotec. Here are the specs. GM 88958648

Ecotec Performance Camshaft Set

For increased power in naturally aspirated and turbocharged engines
Duration @ 0.050" lift is 247° on the intake and 249° on the exhaust
Maximum lift is 0.499" for the intake and 0.499" on the exhaust
Lobe centerline is 116°

About 710.00

https://www.gmpartsdirect.com/oem-pa...t-set-88958648

Randy
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post #10 of 87 (permalink) Old 04-28-2018, 05:24 PM
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Originally Posted by reblacklaf View Post
Ecotec Performance Camshaft Set

For increased power in naturally aspirated and turbocharged engines
Duration @ 0.050" lift is 247° on the intake and 249° on the exhaust
Maximum lift is 0.499" for the intake and 0.499" on the exhaust
Lobe centerline is 116°
From what I can see, the stock cams have In 203 deg, and EX 193 deg, but it should be noted that this is at 1 mm of clearance, which is around 0.010" less than the 0.50" your specs use.

Lift is 0.400" (give or take a couple of thou).

Looks like the performance set is a significant bump up - which explains why some head work is desirable to allow then to function properly.

Frankly, I'm not sure having more power, mostly above 6,000 rpm is worth it.

Current fleet:
1957 Jamaican bodied MGA
1958 MGA Twin Cam (race car)
1962 MGA Deluxe Coupe
1971 Jensen Interceptor
2009 Pontiac Solstice GXP Coupe
2007 BMW Z4M coupe
Recently departed: 1965 Jensen CV8, 1969 Lamborghini Islero S, 1988 Pontiac Fiero GT, 1969 MGC roadster
Mods at https://www.solsticeforum.com/forum/f...thread-102178/

Bill in BC
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post #11 of 87 (permalink) Old 04-29-2018, 11:54 AM
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These are really awesome plans. I'd love to hear what kind of performance gains you achieve. 🙂
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post #12 of 87 (permalink) Old 04-29-2018, 11:59 AM Thread Starter
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Both the Engine and Transmission control units have been sent off to PerformanceAutoWerks for a base tune on top of the GMPP. I'll schedule a dyno session once everything is running and give the base line and the final run results at that time.

Randy
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post #13 of 87 (permalink) Old 04-29-2018, 12:08 PM Thread Starter
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Here is the crate engine department specs on Ecotec Cams. The 88958648 are race only cams and will not work with the stock ECM nor with the vacuum pump or cam sensors.

http://www.crateenginedepot.com/pdfs/ECS.pdf

Randy
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post #14 of 87 (permalink) Old 04-29-2018, 04:55 PM Thread Starter
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Here are my pics of the rims. Both the original and 2 of the new ones.





Randy
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post #15 of 87 (permalink) Old 04-30-2018, 07:59 AM Thread Starter
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Originally Posted by wspohn View Post
That turbo won't be any problem for the stock manual transmission provided it is shifted sensibly - I have the same set up.

I wasn't aware that Comp Cams was doing anything for the LNF - maybe you could post the specs - I'd be curious to see what they suggest.

FWIW, it is generally accepted practice to also upgrade the valve springs when you swap cams - not that you WILL use higher rpm - there is so much mid range there really isn't much need to buzz the engine, but one can inadvertently take it a bit high and the stiffer springs are a sensible protective measure.
Yep on spring replacement. Use to assemble motors for a ProStock 1/4 miler back in the day. Also looking at timing chain, guides, tensioners and all the little bits this motor uses.

No I have an Auto but it has been gone through and upgraded with BMW racing parts. They used the same Auto.

Randy
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