Questions for Calloway (B2K) Modifiers
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,525
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From: Houston TX
Questions for Calloway (B2K) Modifiers
The following was posted in another thread, and as I am not a fan of hi-jacking threads, I would like to carry on here, and delete my responses from the previous thread (you may wish to do the same).
Questions:
1) easycreeper: Even though I know that you are not the original owner of the '88, what are your thoughts to the HP gain from the mods that you negotiated in the purchase (i.e. intake mods, were there others?)? Additionally, you speak of a Calloway intake mod, what is that? I thought the wonderbar was the big improvement. What is the shift point RPM on your car. A standard (stock) L-98 is pretty much done at 46-4800 RPM. My brother says that they both run out of steam by 40-4100 RPM. I find this pretty hard to believe, as they have the turbines pushing additional air.
2) 89B2K: What mods were done to incorporate the MR on your car. Did you run the MR? If so, why was it removed? What was done to run the 2nd injectors? Is your car modified now? I would ask the same questions as above for you with regard to the RPM limit. What is the top RPM (stock and modified)?
Thanks,
Aaron
Originally Posted by Easycreeper 89B2K
Easycreeper posted:
1988 Callaway TT #48. Has 7.5:1 comp. ratio, large Wonderbar and ported wastegates upgrades, and large runners with stock extrude honed intake base. Car made 420rwhp and 586rwtq in 12lbs of boost and 93 octane.
Have not been to the track in this car (don't really plan to, because knowing my luck, something major would break... ), so no timeslips to speak of.
Looking forward to reading about the big number cars lurking out there!
AKS Racing posted:
My brother has a pair of Callaways, the '88 Aerobody is really nice (totally stock), but the '87 std body uses the smaller turbos and is not nearly as nice (really just a decent driver). He has asked me to begin to look at modifying a spare MRII to use on the '87 motor with some other upgrades (i.e. turbos, heads, cam), but no changes to the I/Cs. Was there a reason that you stuck with the original base and added large tube runners? Was this due to all of the fab work required to step to one of the better intakes (MR, Stealthram, etc.).
89B2K posted:
I have a miniram setup for a Callaway . It has 16 injectors and the front of the manifold is machined to bolt up to the Callaway ramshorn. Let me know if you are interested.
Easycreeper posted:
Actually, the previous owner of the car had the large runners and extrude honed base put on the car as part of the negotiated purchase price. The new intake helped the car make power levels comparable to the original intake (435rwhp/575rwtq), but with less boost and lower octane.
Personally, I would love to have a MiniRam on the car. Unfortunately, there is quite a bit of modification that has to take place in order to have it mate up with the ram's horn. There is a beam of light, though. Callaway has been considering remanufacturing the 100+ intake package for those of us that did not have the opportunity to purchase one of the few cars that left Callaway with that modification. I would like to see 89b2k's MR, though.
1988 Callaway TT #48. Has 7.5:1 comp. ratio, large Wonderbar and ported wastegates upgrades, and large runners with stock extrude honed intake base. Car made 420rwhp and 586rwtq in 12lbs of boost and 93 octane.
Have not been to the track in this car (don't really plan to, because knowing my luck, something major would break... ), so no timeslips to speak of.
Looking forward to reading about the big number cars lurking out there!
AKS Racing posted:
My brother has a pair of Callaways, the '88 Aerobody is really nice (totally stock), but the '87 std body uses the smaller turbos and is not nearly as nice (really just a decent driver). He has asked me to begin to look at modifying a spare MRII to use on the '87 motor with some other upgrades (i.e. turbos, heads, cam), but no changes to the I/Cs. Was there a reason that you stuck with the original base and added large tube runners? Was this due to all of the fab work required to step to one of the better intakes (MR, Stealthram, etc.).
89B2K posted:
I have a miniram setup for a Callaway . It has 16 injectors and the front of the manifold is machined to bolt up to the Callaway ramshorn. Let me know if you are interested.
Easycreeper posted:
Actually, the previous owner of the car had the large runners and extrude honed base put on the car as part of the negotiated purchase price. The new intake helped the car make power levels comparable to the original intake (435rwhp/575rwtq), but with less boost and lower octane.
Personally, I would love to have a MiniRam on the car. Unfortunately, there is quite a bit of modification that has to take place in order to have it mate up with the ram's horn. There is a beam of light, though. Callaway has been considering remanufacturing the 100+ intake package for those of us that did not have the opportunity to purchase one of the few cars that left Callaway with that modification. I would like to see 89b2k's MR, though.
Questions:
1) easycreeper: Even though I know that you are not the original owner of the '88, what are your thoughts to the HP gain from the mods that you negotiated in the purchase (i.e. intake mods, were there others?)? Additionally, you speak of a Calloway intake mod, what is that? I thought the wonderbar was the big improvement. What is the shift point RPM on your car. A standard (stock) L-98 is pretty much done at 46-4800 RPM. My brother says that they both run out of steam by 40-4100 RPM. I find this pretty hard to believe, as they have the turbines pushing additional air.
2) 89B2K: What mods were done to incorporate the MR on your car. Did you run the MR? If so, why was it removed? What was done to run the 2nd injectors? Is your car modified now? I would ask the same questions as above for you with regard to the RPM limit. What is the top RPM (stock and modified)?
Thanks,
Aaron
Last edited by AKS Racing; Nov 18, 2005 at 09:47 AM.
Team Owner
Joined: Aug 1999
Posts: 24,017
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St. Jude Donor '10
Easycreeper's car used to be mine.
I bought the car from the original owner in 2002. The car had the Wonderbar upgrade to the 1991 spec. I also had a TPIS large tube runners and extrude honed base/plenum installed. The car shoudld pull to about 5k-5200 with the intake mod...before that it was still all done by 4800rpm.
The turbos on the car don't overcome the loooooong runners. However, member 632C2 had his turbines upgraded and that car made power to 6krpm if I recall. Of course it was a 650rwhp car!!!
The car had the big Wonderbar when I bought it and thru the stock exhaust it made 406rwhp...moving to dual 2.75" Power Effects system gave a 30rwhp jump and 40rwtq plus the turbos spooled WAY faster.
The kicker is these cars really hate a dyno....the intercoolers sit on top of the motor and are meant to be fed by cool air coming thru the hood from moving road. Ambient air temps are usually 150+++ around the car after a couple of runs. Once we got a reading of 175 F at the intercoolers.
stock L98 exhaust-~13.5psi 100 octane
Power Effects-upper ~13.5psi 100octane. the lower graph was with the PE closed making about 10psi.
PS....That 89 car has 16 injectors.
I bought the car from the original owner in 2002. The car had the Wonderbar upgrade to the 1991 spec. I also had a TPIS large tube runners and extrude honed base/plenum installed. The car shoudld pull to about 5k-5200 with the intake mod...before that it was still all done by 4800rpm.
The turbos on the car don't overcome the loooooong runners. However, member 632C2 had his turbines upgraded and that car made power to 6krpm if I recall. Of course it was a 650rwhp car!!!
The car had the big Wonderbar when I bought it and thru the stock exhaust it made 406rwhp...moving to dual 2.75" Power Effects system gave a 30rwhp jump and 40rwtq plus the turbos spooled WAY faster.
The kicker is these cars really hate a dyno....the intercoolers sit on top of the motor and are meant to be fed by cool air coming thru the hood from moving road. Ambient air temps are usually 150+++ around the car after a couple of runs. Once we got a reading of 175 F at the intercoolers.
stock L98 exhaust-~13.5psi 100 octane
Power Effects-upper ~13.5psi 100octane. the lower graph was with the PE closed making about 10psi.
PS....That 89 car has 16 injectors.
Last edited by SurfnSun; Nov 18, 2005 at 05:28 PM.
Team Owner
Joined: Aug 1999
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St. Jude Donor '10
Originally Posted by bill mcdonald
Hey Surf, do you think he is speaking of the callaway 100+ intake here?
Instructor
Joined: Aug 2003
Posts: 105
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From: Macon GA
Originally Posted by bill mcdonald
Hey Surf, do you think he is speaking of the callaway 100+ intake here?
Aaron,
The 100+ intake I mentioned was an additiona ~$11K to the purchase price of the car. It included more than just a short runner intake, but I'm not exactly sure of everything else that went into the package. The intake is the key though, as the shorter runners expand the RPM range a bit and allow the car to make more peak horsepower. If you would like to know more, you should contact *89x2* as he knows just about everything Callaway.
The car pulls hard up to 135MPH and hits redline shortly thereafter at 141MPH (OD is toast). Like SurfnSun said, the powerband was increased slightly with the larger runners and ported base and their ability to flow more air.
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Joined: Jul 2004
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As I said before the intake angle to the throttlebody on the miniram was altered to boltup to the ramshorn .This was done by adding billit aluminum the to the front of the manifold to match the angle of the ramshorn .The ramshorn was also modified to attach to the manifold. With the miniram 7500-8000 rpm was not a problem-but the turbos don't move enough air to rev this high-5800 to 6000 was the best range to shift. Talked to Callaway about the extra 8 injectors And they said I could fire them with the Callaway micro fueler-it worked just fine.
Changed the manifold because I changed my setup to 427 cu and larger turbos with a accell gen 7 management syste
Changed the manifold because I changed my setup to 427 cu and larger turbos with a accell gen 7 management syste
Last edited by 89b2k; Nov 18, 2005 at 07:30 PM.
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
THanks for the responses guys. What are you alls thoughts on modifying an '87 for additional power? Keep in mind, this is not some really nice must keep absolutely stock Calloway.
Thoughts?
Aaron
Thoughts?
Aaron
Team Owner
Joined: Aug 1999
Posts: 24,017
Likes: 634
St. Jude Donor '10
3" dual exhaust, turn up the boost and use an AFPR. Ive heard you should be able to get near 500 crank hp with those turbos.
If youre up for a bigger job, id go with an 88-90 style wonderbar, but thats pretty pricey. The biggest limitation is the turbos, obviously. I dont know about IHI turbos, but the rotomasters can have larger compressor housings made to work. Evergreen Turbo in Ocala FL has rebuilt several Call[b]a[/]way owners turbos in the last couple of years. The problem is there is a serious shortage of bearings for rotomasters.
If youre up for a bigger job, id go with an 88-90 style wonderbar, but thats pretty pricey. The biggest limitation is the turbos, obviously. I dont know about IHI turbos, but the rotomasters can have larger compressor housings made to work. Evergreen Turbo in Ocala FL has rebuilt several Call[b]a[/]way owners turbos in the last couple of years. The problem is there is a serious shortage of bearings for rotomasters.
Last edited by SurfnSun; Nov 19, 2005 at 09:17 AM.
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Instructor
Joined: Aug 2003
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From: Macon GA
Aaron,
Try contacting EricVonHa over on the Callaway Forum on the Corvette Action Center. His 1987 is modified with the 88+ turbos as well as various other upgrades. Perhaps he can give you a little better insight as to what to expect and what works.
Justin
Try contacting EricVonHa over on the Callaway Forum on the Corvette Action Center. His 1987 is modified with the 88+ turbos as well as various other upgrades. Perhaps he can give you a little better insight as to what to expect and what works.
Justin
