Hello,
I am in the process of looking for a couple extra mpg from the ole 2.5 liter TBI. Since it is a daily driver, I want to keep things simple and balanced. My goal it to develop torque, to fasciitate increased fuel economy; ultimately, I am hoping to hit 41+ without a turbo.
The engine is stock and original, it just went over 100,000. I have procured 2 donor heads; an 87 T1 and a 94 TBI. Both heads were cracked and both are Mexican 782's; the T1 head was unfortunately cracked beyond normal repair but the 94 TBI, despite some damage is usable.
I have chosen to use the stock intake and exhaust manifolds from the 94 TBI for the project. I have chosen Mr. David Endrigo of Flowtecnics, Poulsbo Wa, to perform the port/polish and flow-bench work along with the rework of the stock manifolds. He has completed the rework on the exhaust manifold and is currently reworking the intake manifold. He was impressed with the exhaust design but very disappointed with the intake manifold's. He told me that it needs the T/B higher and a less severe turn at the base. He has a couple of ideas, he isn't sure if he wants to build an insert, custom riser or build up the base of the intake for that T/B. Either way, some improved fuel delivery is" in the works".
For the head, all the work is for torque, multiple angle valve job, we didn't discuss cutbacks for the valve stems but he will do it if he feels it adds to the balance. The brain, or cam is also from the 94 TBI; it is getting a custom regrind in accordance with Mr Endrigo's specifications.
I am very excited and have, high expectations. The auto currently maintains a steady 26/31 fuel economy, which I am actually pleased with, just not satisfied. I use an aftermarket coil, 8.2 wires, E3 plugs, a K&N, Mobile 1 and a Dynomax cat-back for the tune, currently @ 12 BTDC. Over the past month, I have installed a new Gates timing belt/tensioner, an ASP crankshaft under-drive pulley with replacement power steering/alternator belts. She feels pretty good these days
I am using the T1'S exhaust springs and valves for the head, I don't think there was anything else from the T1 that is improved over the TBI for Turbo use? Is there, were the valve guides the same?
This coming spring, if the Sundance makes it through the winter, I plan to add the T1 system to this 2.5. I will keep everyone informed of the progress.
I am in the process of looking for a couple extra mpg from the ole 2.5 liter TBI. Since it is a daily driver, I want to keep things simple and balanced. My goal it to develop torque, to fasciitate increased fuel economy; ultimately, I am hoping to hit 41+ without a turbo.
The engine is stock and original, it just went over 100,000. I have procured 2 donor heads; an 87 T1 and a 94 TBI. Both heads were cracked and both are Mexican 782's; the T1 head was unfortunately cracked beyond normal repair but the 94 TBI, despite some damage is usable.
I have chosen to use the stock intake and exhaust manifolds from the 94 TBI for the project. I have chosen Mr. David Endrigo of Flowtecnics, Poulsbo Wa, to perform the port/polish and flow-bench work along with the rework of the stock manifolds. He has completed the rework on the exhaust manifold and is currently reworking the intake manifold. He was impressed with the exhaust design but very disappointed with the intake manifold's. He told me that it needs the T/B higher and a less severe turn at the base. He has a couple of ideas, he isn't sure if he wants to build an insert, custom riser or build up the base of the intake for that T/B. Either way, some improved fuel delivery is" in the works".
For the head, all the work is for torque, multiple angle valve job, we didn't discuss cutbacks for the valve stems but he will do it if he feels it adds to the balance. The brain, or cam is also from the 94 TBI; it is getting a custom regrind in accordance with Mr Endrigo's specifications.
I am very excited and have, high expectations. The auto currently maintains a steady 26/31 fuel economy, which I am actually pleased with, just not satisfied. I use an aftermarket coil, 8.2 wires, E3 plugs, a K&N, Mobile 1 and a Dynomax cat-back for the tune, currently @ 12 BTDC. Over the past month, I have installed a new Gates timing belt/tensioner, an ASP crankshaft under-drive pulley with replacement power steering/alternator belts. She feels pretty good these days
I am using the T1'S exhaust springs and valves for the head, I don't think there was anything else from the T1 that is improved over the TBI for Turbo use? Is there, were the valve guides the same?
This coming spring, if the Sundance makes it through the winter, I plan to add the T1 system to this 2.5. I will keep everyone informed of the progress.
