questtuner82 Posted November 20, 2014 Report Share Posted November 20, 2014 Ok so im building a new motor and turbo. Specs of motor... .40 over with je custom pistons 7.5:1 c/r, custom carillo h beam connecting rods, block is race prepped with webbings machined down. Race prepped crank lightened knife edged renitraded with chromed journals chamfered oil holes. Balanced rotating assy bse kit block was zero decked. Amc marnel head with 2" and 1.6" stainless valves maganese bronze valve guides heavily ported and polished chambers are smoothed and polished and cc'd custom grind turbo cam. 304 duration .530 lift 108lsa beehive springs with 110lb seat pressure custom typhoon style intake with velocity stack runners 72lb injectors and 80mm throttle body. Now for the turbo..... Garrett gt35r ball bearing turbo oil and liquid fed ext w/g. Not exactly sure of specs. I believe it is 70a/r. Its going on a custom header with dual 38 mm wastegates. 4" inlet 2.5" outlet cold side with 3" exhaust outlet. Just trying to figure out if this turbo will work good with this build or if its too small or to big. Also using a big intercooler by mishimoto with 2.5" in/out and 2.5" ic piping. Will be using ms3 and edis with cop. Id like to know what ppl are thinking on this setup and how the engine/turbo will perform. Also just curious on hp guessing? This will hopefully be installed in spring as all winter the car will be torn down and full suspension restore and body restore. Any suggestions on turbo would greatly be appreciated. Motor is already built just looking for some turbo info/suggestions for my setup Link to comment Share on other sites More sharing options...
ucw458 Posted November 20, 2014 Report Share Posted November 20, 2014 TB is a little big. 65mm is 2.5". Having a bigger TB than the IC and turbo outlets doesn't help. It just makes throttle tip in harder to tune. I'm using a 65mm TB from a ford 4.6 on mine. A GT35r can flow 60 lb/min of air. That's enough to get a 4g63 into 600+hp territory. So take that into consideration whether or not the turbo is bigger than your power goal. 72lb injectors will get you to around 300-350 HP on pump gas. If that's your power goal then you're set. If not go bigger. I'm running 120 lb injectors. Dual 38mm WGs is a bit overkill. Only really used for split port turbos. My GT35 has a single 38mm external WG. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 20, 2014 Author Report Share Posted November 20, 2014 Ok thanks for the input. The turbo is a twin scroll housing and the header is twin scroll flanged as well. I plan on running like 30-35 psi boost. So bigger injectors??? Not sure what i plan on putting down for hp yet but would love to get as much as possible. As tim allen on tool time says "more power" lol. As for fuel i have easy access to vp racing fuel which is 112 octane so i think ill be using that in this car. So smaller throttle body?? My intake isnt totally finished so i can still do the smaller t/b if it would help with tune and throttle response Link to comment Share on other sites More sharing options...
ucw458 Posted November 20, 2014 Report Share Posted November 20, 2014 2.5" pipes feeding a 3.15" valve (80mm TB) means the TB can outflow the IC pipes. That means you will hit full throttle before you hit full throttle. Meaning somewhere around 1/2-3/4 throttle opening and you will be flowing all the IC pipes can feed. Pushing the throttle down farther will yield no extra power. Not to mention it will be harder to take off from a stop light without giving it too much throttle. If you plan on boosting 30+ psi then 72lb injectors are gonna run out of fuel before you get there. Have you factored in trans, driveshaft, axles into your HP goal? Stock trans will not hold up to those power levels. Neither will the stock u-joints. And if you plan on drag racing the CV axles probably wont hold up. People have broken the stock trans at around 300hp. At 30+ psi with sticky tires the only reliable parts behind the engine will be diff and wheel hubs. The rest of the stock parts will break. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 20, 2014 Author Report Share Posted November 20, 2014 Not sure about trans yet but the rearend is going to be a ford 8.8" out of a thunderbird. The cv axles are going to be a custom made set that uses the 89 rear hubs and will work with the ford rear diff. This also allows me to get alot more options for gearing. If you are familiar with the 89-95 thunderbirds they have an independant rear suspension and the rear diff will work with some bracket mods. The driveshaft will end up being custom also. Link to comment Share on other sites More sharing options...
scott87star Posted November 21, 2014 Report Share Posted November 21, 2014 Forget EDIS, just go with direct coil control, easy peasy and you get all the ignition retard/cut features of the ECU at your disposal. You can run the EDIS style coil pack, CNP or COP. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 21, 2014 Author Report Share Posted November 21, 2014 Scott im going to be getting in touch with you for fuel and ign control computer and harness. Just waiting for some money from my 68 camaro ss that im selling Link to comment Share on other sites More sharing options...
ucw458 Posted November 21, 2014 Report Share Posted November 21, 2014 The stock diff is more than capable of handling the power. You just need stronger CV axles which are available. Different gear ratios for the stock diff are also available. Link to comment Share on other sites More sharing options...
STARION_NORTH Posted November 22, 2014 Report Share Posted November 22, 2014 Tell me more about the custom Carillo rods, what are the demensions, weight, cost, etc. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 23, 2014 Author Report Share Posted November 23, 2014 The carillo rods ill have to get exact specs. I do know the crank pin journals were machined down a decent amount and the oil holes were bored bigger then welded again at a different angle to allow more direct oil coverage. There were alot of mods done on the whole build. Ill post specs when i get home from vacation from the blueprints. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 23, 2014 Author Report Share Posted November 23, 2014 Carillo rod specs are 6.70" center to center wrist pin diameter .987" journal size is 1.997" rod length is 1.175" at rod journal. Note the rods were a custom rod and were $1800 shipped Link to comment Share on other sites More sharing options...
Dad Posted November 23, 2014 Report Share Posted November 23, 2014 Carillo rod specs are 6.70" center to center wrist pin diameter .987" journal size is 1.997" rod length is 1.175" at rod journal. Note the rods were a custom rod and were $1800 shipped Interesting, just for comparison, stock rods center to center 6.536 with ,864 pin bore (,866 pin dia). crank rod journal dia. 2.086 with rod width of 1.178. Dad Link to comment Share on other sites More sharing options...
questtuner82 Posted November 23, 2014 Author Report Share Posted November 23, 2014 Yes it is interesting. The pistons are custom made the rods are custom and the crank had alot of machine work done to it. The rod journals were machined down to accept the rods and all the oil holes were enlarged and cut at a different angle then they were welded up and the crank was renitrided and journals were chromed. It was lightened alot and knife edged. Im trying to load pics from photobucket but it wont let me. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 23, 2014 Author Report Share Posted November 23, 2014 The thicker pin diameter allows more boost psi with less chance of pin breakage or piston cracking. The pin is double thickness for super heavyduty use. They are listed as severe duty pins and is a chevy sbc standard size also the rods are based on the nascar series toyota v8 engines Link to comment Share on other sites More sharing options...
STARION_NORTH Posted November 24, 2014 Report Share Posted November 24, 2014 If the rods were custom then why weren't they made to stock demensions? Sounds more like custom pistons and machine work to make an off the shelf rod fit a G54b. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 24, 2014 Author Report Share Posted November 24, 2014 Changing rod/ crank angle its used to stroke or destroke a motor a small amount to get better torque or hp depending on build. The head porting and big valves help it breathe. The custom grind cam makes it breathe and the mpi intake is designed to make the motor breathe with high boost applications. Link to comment Share on other sites More sharing options...
STARION_NORTH Posted November 24, 2014 Report Share Posted November 24, 2014 Changing connecting rod length has no effect on stroke. The only way to change stroke would be to offset grind the rod journal to change its relation to the crankshaft center line. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 24, 2014 Author Report Share Posted November 24, 2014 Changing rod length changes rod angle which in turn changes stroke in laymens terms. Maybe dad can chime in on this since all he does is build engines Link to comment Share on other sites More sharing options...
Dad Posted November 24, 2014 Report Share Posted November 24, 2014 Stroke is determined from the crankshaft. Link to comment Share on other sites More sharing options...
STARION_NORTH Posted November 24, 2014 Report Share Posted November 24, 2014 Thanks dad! Link to comment Share on other sites More sharing options...
ucw458 Posted November 24, 2014 Report Share Posted November 24, 2014 lol Link to comment Share on other sites More sharing options...
STARION_NORTH Posted November 24, 2014 Report Share Posted November 24, 2014 In layman's terms, he does not know what he is talking about. Link to comment Share on other sites More sharing options...
questtuner82 Posted November 25, 2014 Author Report Share Posted November 25, 2014 Dad can u elaborate the reasons why people change connecting rod length and also the benefits of changing rod angle in a engine? For instance on a sbc 383 stroker some people use 5.7" rods and others use 6.0" rods. The longer rods on a 383 create more torque and hp and give you a broader rpm curve of torque/hp gains over a 5.7" rod Link to comment Share on other sites More sharing options...
StarquestRescue Posted November 25, 2014 Report Share Posted November 25, 2014 The op motor spec's keep evolving. Ok so im getting ready to get all my new stuff in..... Fully built motor .60 over with je forged pistons pauter rods lightened and knife edged crank bse balanced with lightweight flywheel, ported non jet head with 2mm oversized ferrea stainless valves beehive springs crower custom roller cam with 6g72 roller lifters custom mpi intake a gt35r turbo edis ign 2.5" hardpipe 3" exhaust with apexi muffler. Just wondering what kind of intercooler i should use and can fit in there with little to no mods size or a link would be greatMotor is already done. It was built by early performance. The motor was already .40 over prior to this. The cylinders had some deep scoring so thats why its .60 over. And with the pistons i have in it and with the work done to the combustion chamber in the head ill have 8.5:1 compression ratio. The head is ported and polished to the max and has the biggest valves possible with oversized stems and bigger valve guides that were knurled. Motor should really build alot of power and flow with the head mods. The mpi intake that was built is a replica of a typhoon intake. And has velocity stacks on the runners with a 80mm throttle body. For injectors i have 680cc fast injectors but may have to go bigger or smaller but not sure yet and all the hardpipes are 2.5" all custom made a gt35r turbo .82a/r with 44 mm external wastegate. Im looking at building 30+ psi of boost on this motor Link to comment Share on other sites More sharing options...
STARION_NORTH Posted November 25, 2014 Report Share Posted November 25, 2014 Lmao Link to comment Share on other sites More sharing options...
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