Well, this has been in the pipeline for a couple of months now, but I did not want to get ahead of myself and start posting stuff before I had something tangible in my hands.
A while ago, I have contacted a well-known camshaft manufacturing/regrinding company regarding creating some high performance cams for the Toyota 5.7
These guys generally deal with domestic cars and trucks, and haven't done much with the import market, but after hearing from me about the impossibility of finding any cams for this engine, they decided to take on the challenge of designing something that would work for this platform.
I had an opportunity to discuss the nuances of this engine with their cam profile designer who has over 30 years experience designing custom cams.
I have sent them all the factory tech info I could get my hands on regarding the vvt-i system operation, the valvetrain setup, as well as a set of cams, rocker arms and lash adjusters.
The goal was to design a profile that would work well with NA as well S/C motors, have stable idle and give a good amount of mid range and top end power increase while keeping the bottom end losses to a minimum.
After they inspected the cams I provided and upon some discussion we agreed on what will be called a Stage 1 grind - moderately aggressive, but not too crazy.
Now, the cams are in my hands and ready to be first tested in a set of heads on the bench, and then in the truck.
Even though we think these will work fine, we still have to see if the stock lash adjuster will be able to take up the extra clearance without shimming, that there is no valve float and that the valves don't touch pistons under any and all vvt-i operating conditions and engine speeds.
Additionally, I have to make sure the fuel system can handle the extra fuel requirements at high RPM.
These will be installed in a bone stock motor and a before and after dyno will be done in the next month or two.
The profile designer said that based on all of his experience, he is expecting conservatively a 10-15% power increase in mid-high RPM.
I don't want to get too excited just yet, but IF everything works out as planned, this would be an extra 40-60 HP on a stock engine!
I have discussed setting up a distribution deal with them and at this point, if the grind works well, I should be able to make these available for order by November.
These will be regrinds of clean used cams that will be inspected and measured for journal size and runout before being sent out for regrind.
Price wise, it would be around $1000 - $1100 for a set of 4, plus a refundable $400 core charge.
Let me know what you guys think and I will keep you posted once they are installed and dynoed.
I should have some hard data (or a set of matching round holes in my pistons) in the next 6-8 weeks.
A while ago, I have contacted a well-known camshaft manufacturing/regrinding company regarding creating some high performance cams for the Toyota 5.7
These guys generally deal with domestic cars and trucks, and haven't done much with the import market, but after hearing from me about the impossibility of finding any cams for this engine, they decided to take on the challenge of designing something that would work for this platform.
I had an opportunity to discuss the nuances of this engine with their cam profile designer who has over 30 years experience designing custom cams.
I have sent them all the factory tech info I could get my hands on regarding the vvt-i system operation, the valvetrain setup, as well as a set of cams, rocker arms and lash adjusters.
The goal was to design a profile that would work well with NA as well S/C motors, have stable idle and give a good amount of mid range and top end power increase while keeping the bottom end losses to a minimum.
After they inspected the cams I provided and upon some discussion we agreed on what will be called a Stage 1 grind - moderately aggressive, but not too crazy.
Now, the cams are in my hands and ready to be first tested in a set of heads on the bench, and then in the truck.
Even though we think these will work fine, we still have to see if the stock lash adjuster will be able to take up the extra clearance without shimming, that there is no valve float and that the valves don't touch pistons under any and all vvt-i operating conditions and engine speeds.
Additionally, I have to make sure the fuel system can handle the extra fuel requirements at high RPM.
These will be installed in a bone stock motor and a before and after dyno will be done in the next month or two.
The profile designer said that based on all of his experience, he is expecting conservatively a 10-15% power increase in mid-high RPM.
I don't want to get too excited just yet, but IF everything works out as planned, this would be an extra 40-60 HP on a stock engine!
I have discussed setting up a distribution deal with them and at this point, if the grind works well, I should be able to make these available for order by November.
These will be regrinds of clean used cams that will be inspected and measured for journal size and runout before being sent out for regrind.
Price wise, it would be around $1000 - $1100 for a set of 4, plus a refundable $400 core charge.
Let me know what you guys think and I will keep you posted once they are installed and dynoed.
I should have some hard data (or a set of matching round holes in my pistons) in the next 6-8 weeks.