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tobiism
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Joined: January 21, 2004
Posts: 525
Location: Chandler AZ
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 Posted: Fri Jan 02, 2026 10:19 am Post subject: Rev happy but Torquey Porsche style engine |
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If you were to put together a type 1 engine that had sufficient Lowdown torque but also had that rev happy Porsche feel what would you build?
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sled
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Joined: February 16, 2005
Posts: 6368
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| Posted: Fri Jan 02, 2026 4:27 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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Alstrup
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Joined: July 12, 2007
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Location: Videbaek Denmark
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| Posted: Fri Jan 02, 2026 5:25 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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| tobiism wrote: |
| If you were to put together a type 1 engine that had sufficient Lowdown torque but also had that rev happy Porsche feel what would you build? |
Which Porsche?
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tobiism
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Joined: January 21, 2004
Posts: 525
Location: Chandler AZ
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| Posted: Fri Jan 02, 2026 5:33 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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| Alstrup wrote: |
| tobiism wrote: |
| If you were to put together a type 1 engine that had sufficient Lowdown torque but also had that rev happy Porsche feel what would you build? |
Which Porsche? |
I guess that would help! I was thinking of like a 1970 911S 2.2
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sled
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Joined: February 16, 2005
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| Posted: Fri Jan 02, 2026 6:23 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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its pretty difficult to compare a 4 cylinder to a 6 cylinder. Two extra pistons working on the crank for any given revolution.
its pretty easy to build a 2.2 liter type 1 that makes lots of torque and revs happily.
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tobiism
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Joined: January 21, 2004
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Location: Chandler AZ
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| Posted: Fri Jan 02, 2026 6:51 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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| sled wrote: |
its pretty difficult to compare a 4 cylinder to a 6 cylinder. Two extra pistons working on the crank for any given revolution.
its pretty easy to build a 2.2 liter type 1 that makes lots of torque and revs happily. |
Of course, I get that, and I've built a couple of 2276's that drove very nicely.
Maybe i phrased it wrong.
With our lovely little four cylinder, what stroke, bore, rod ratio, cam and head would you choose for enough torque at low rpms to make street driving pleasant but zing up to 6500?
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jpaull
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Joined: February 22, 2005
Posts: 3689
Location: Paradise, Ca
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| Posted: Fri Jan 02, 2026 7:26 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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If you were shooting for 70's Porsche 911 SC, the bar is being set pretty low. Those were slow revving engines and a car that weighs 800lbs more than a bug. They had 200hp, and could barely muster a 15 second quarter mile.
if you get into the honest real 160-175hp 2.2liter in a bug, you will have 25% better power to weight ratio and the car will have more torque with less measured torque at the flywheel just cause its so much lighter.
If your goal is building torquey rev happy engine, any type 1 with a 82+ crank, 92+ pistons, mild cam and decent heads is gonna give you more than your asking for.
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[email protected] MPH 1/4 Mile & 8.1 @ 83.7MPH in 1/8 Mile with Mild Type 1 VW Mag Case 2234cc commuter engine in stock weight bug w/only .491 total lift(CB2292 Cam), 42x37 heads, 48idf's, Street tires, Belt on, Mufflers, Pump gas, video of the run here: https://youtu.be/M3SPqMOKAOg
Transmission by MCMScott:
Rhino case, Klinkenberg 4.12, Superdiff, 002 mainshaft with 091 first idler. Weddle 1.48 Third & 1.14 Fourth. |
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tobiism
Samba Member
Joined: January 21, 2004
Posts: 525
Location: Chandler AZ
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| Posted: Fri Jan 02, 2026 7:45 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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| jpaull wrote: |
If you were shooting for 70's Porsche 911 SC, the bar is being set pretty low. Those were slow revving engines and a car that weighs 800lbs more than a bug. They had 200hp, and could barely muster a 15 second quarter mile.
if you get into the honest real 160-175hp 2.2liter in a bug, you will have 25% better power to weight ratio and the car will have more torque with less measured torque at the flywheel just cause its so much lighter.
If your goal is building torquey rev happy engine, any type 1 with a 82+ crank, 92+ pistons, mild cam and decent heads is gonna give you more than your asking for. |
The first engine i built was 2276 with fk8 9:1 and ported street eliminators, IDA's
Current is 2276, fk45, 9.5:1, DRD L6 heads, 48 IDF's (currently torn down for changing out the heads)
Both ran great. No issues.
I'm just fascinated by the changes that rod ratio, cams, cam timing, stroke length and the like can change the driving characteristics.
Just learning I guess!
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jpaull
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Joined: February 22, 2005
Posts: 3689
Location: Paradise, Ca
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| Posted: Fri Jan 02, 2026 8:41 pm Post subject: Re: Rev happy but Torquey Porsche style engine |
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| tobiism wrote: |
| jpaull wrote: |
If you were shooting for 70's Porsche 911 SC, the bar is being set pretty low. Those were slow revving engines and a car that weighs 800lbs more than a bug. They had 200hp, and could barely muster a 15 second quarter mile.
if you get into the honest real 160-175hp 2.2liter in a bug, you will have 25% better power to weight ratio and the car will have more torque with less measured torque at the flywheel just cause its so much lighter.
If your goal is building torquey rev happy engine, any type 1 with a 82+ crank, 92+ pistons, mild cam and decent heads is gonna give you more than your asking for. |
The first engine i built was 2276 with fk8 9:1 and ported street eliminators, IDA's
Current is 2276, fk45, 9.5:1, DRD L6 heads, 48 IDF's (currently torn down for changing out the heads)
Both ran great. No issues.
I'm just fascinated by the changes that rod ratio, cams, cam timing, stroke length and the like can change the driving characteristics.
Just learning I guess! |
Both of your engines, you went with pretty low compression for the combo.
On both your fk45 and your fk8 engines, they are closing the intake valve at 57 degrees. You could go to 10.6:1 safely with 91 octane in Chandler AZ and that would wake up those engines alot. More difference then rod ratios or many other things. Adding Compression makes more power across the whole rpm range.
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[email protected] MPH 1/4 Mile & 8.1 @ 83.7MPH in 1/8 Mile with Mild Type 1 VW Mag Case 2234cc commuter engine in stock weight bug w/only .491 total lift(CB2292 Cam), 42x37 heads, 48idf's, Street tires, Belt on, Mufflers, Pump gas, video of the run here: https://youtu.be/M3SPqMOKAOg
Transmission by MCMScott:
Rhino case, Klinkenberg 4.12, Superdiff, 002 mainshaft with 091 first idler. Weddle 1.48 Third & 1.14 Fourth. |
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