165 to 195 runners

[marv02]

When I built my new 357 motor I went from the stock L98 block to a 4 bolt main bored .040 over block.

I should have 10 to 1 compression if all the number are right.

The car pulls hard after 3500 to red line I think due to the New intake runner Hotter Cam and the TFS 195 heads.

But I have notice I dont have the low end grunt I use to have.

I runnning full lenght headers and Chip has been burned for the combo.

Is this normal to lose low end grunt do to 195 heads.

I also changed out the TQ converter to a 2200 stall from the stock 1800 Stall do I need more stall to get grunt back.

 

[Indycars]

Marv,

Is this description that you posted on 7-13-2010 still correct ???
Are you sure that 280 degrees duration is at 0.050" lift ??? That's a lot of duration with only .477 lift (Valve Lift).

My motor is a mouse motor 355 with
Trick flow 23 195 heads 62 cc heads angle plug 480 springs
Howards cam 280/280 Duration @.050 .477/.477 lift 111 C/L RPM range 1000 to 5300
Roller rockers 1.5
Comp cam timing set set at Zero no advance
Comp cam harden push rods
Stock oil pump the reason I have read that a high flow pump flows so much oil with a 5 Qt pan it can run it self dry thats not a good thing to happen.
Kenkvo 5 qt oil pan and pick up
All APR hardware
Running 9.5 to 1
High Flow base SPL runners
24 LB FIC injectors
Engine oil cooler
Stock exhaust manifolds though Magna flow mufflers
307 rearend
I going to use a 2000 stall converter
Trans cooler 18000 GRW

 

[grumpyvette]

While upgrading the head port size has some effect on the engines torque curve its the increased duration on the cam that had the most effect, many guys upgrade a cam and intake to produce better horsepower, forgetting in the process that you boosted horsepower by increasing the average rpm where the engine makes torque efficiently,you need to match the rear gear ratio with the current engines power curve swapping to a slightly stiffer rear gear ratio,(IE changing from a 2.87-3.08_to something like a 3.54:1-4.11:1 rear gear) and an over drive transmission to maintain the cars mileage in most case will get you the best of both worlds, (more power and retaining similar mileage)


related info worth remembering when planing an engine combo

USE THE CALCULATORS to match port size to intended rpm levels... but keep in mind valve lift and port flow limitations[/color]
http://www.wallaceracing.com/runnertorquecalc.php
http://www.wallaceracing.com/ca-calc.php
http://www.wallaceracing.com/area-under-curve.php
http://www.wallaceracing.com/chokepoint.php
http://www.wallaceracing.com/header_length.php

viewtopic.php?f=55&t=624&p=11495&hilit=volumetric#p11495

viewtopic.php?f=52&t=322&p=10973&hilit=volumetric#p10973

viewtopic.php?f=53&t=3893&p=10377&hilit=volumetric#p10377

viewtopic.php?f=52&t=2782&p=7433&hilit=+volumetric#p7433

viewtopic.php?f=50&t=1652&p=5690&hilit=+matching#p5690

 

[marv02]

Cam Card Info
Valve Lift .447 In .447 Ex Degrees of Duration 290 In 290 Ex C/L 111 intake C/L 107
At .050 .298 In .298 Ex Degrre of duration @.050 214 In 214 Ex
In Open 0 In Close 34 Ex Open 42 Ex Close -8

Marv,

Is this description that you posted on 7-13-2010 still correct ???
Are you sure that 280 degrees duration is at 0.050" lift ??? That's a lot of duration with only .477 lift (Valve Lift).

My motor is a mouse motor 355 with
Trick flow 23 195 heads 62 cc heads angle plug 480 springs
Howards cam 280/280 Duration @.050 .477/.477 lift 111 C/L RPM range 1000 to 5300
Roller rockers 1.5
Comp cam timing set set at Zero no advance
Comp cam harden push rods
Stock oil pump the reason I have read that a high flow pump flows so much oil with a 5 Qt pan it can run it self dry thats not a good thing to happen.
Kenkvo 5 qt oil pan and pick up
All APR hardware
Running 9.5 to 1
High Flow base SPL runners
24 LB FIC injectors
Engine oil cooler
Stock exhaust manifolds though Magna flow mufflers
307 rearend
I going to use a 2000 stall converter
Trans cooler 18000 GRW

 

[grumpyvette]

with a cam that mild and your basic combo the torque curve should only have moved a few hundred rpm higher in the rpm band, so the change in effective power range would be minimal, Id suggest looking into tuning issues like ignition advance and the air/fuel ratio a bit further, and if you've got cats or the stock exhaust system,check the back pressure on the exhaust system
do the basics, a compression check, adjust the valves, check the cam and ignition timing is correct, check fuel pressure, verify the ignition firing order and carb float levels etc.
you might be amazed at the number of times things you were 100% sure were done correctly, turn out to be miss adjusted, over-looked or just forgotten

viewtopic.php?f=55&t=109

viewtopic.php?f=56&t=495

viewtopic.php?f=50&t=609&p=5406&hilit=+start+basics#p5406

viewtopic.php?f=70&t=3438&p=10843&hilit=ignition+advance#p10843

viewtopic.php?f=70&t=1015&p=1864&hilit=ignition+tabs#p1864

viewtopic.php?f=52&t=90

 

[busterrm]

Marv,

Is this description that you posted on 7-13-2010 still correct ???
Are you sure that 280 degrees duration is at 0.050" lift ??? That's a lot of duration with only .477 lift (Valve Lift).

My motor is a mouse motor 355 with
Trick flow 23 195 heads 62 cc heads angle plug 480 springs
Howards cam 280/280 Duration @.050 .477/.477 lift 111 C/L RPM range 1000 to 5300
Roller rockers 1.5
Comp cam timing set set at Zero no advance
Comp cam harden push rods
Stock oil pump the reason I have read that a high flow pump flows so much oil with a 5 Qt pan it can run it self dry thats not a good thing to happen.
Kenkvo 5 qt oil pan and pick up
All APR hardware
Running 9.5 to 1
High Flow base SPL runners
24 LB FIC injectors
Engine oil cooler
Stock exhaust manifolds though Magna flow mufflers
307 rearend
I going to use a 2000 stall converter
Trans cooler 18000 GRW

I agree thats an awful lot of duration for 477 lift., I would say that duration in probably in the 225 -235 range at 050.